Hayden, 22, took in some tennis this past weekend in Hawaii with her New York Jets beau Scotty McKnight, 24, though it may have been hard for the athlete to focus with the Heroes actress sporting a dark string bikini. 

Jennifer Love, 33, made her match a bit more interesting by not only wearing a skimpy black swimsuit, but also working a pair of sky-high wedges. Back in August 2009, The Client List actress took in some tennis with her then boyfriend and Ghost Whisperer costar Jamie Kennedy, 41.

Both ladies are heating up the court in their teeny bikinis, but there can only be one winner in this showdown. 

Who do you think wins this match: Hayden or Jennifer? Cast your vote in the poll and stand by your gal in the comments, below.

Hayden’s bikini moments didn’t stop on the tennis court. The young starlet and her shirtless NFL beau were also seen playing basketball and sharing some kisses while on holiday.

While Hayden is in Hawaii, you can catch on her on the newest episode of Punk’d tonight, April 12. Check her out pranking Glee gal Dianna Agron in the exclusive video below: 

Following behind the likes of Khloe Kardashian and Taylor Swift from past episodes, this prank really shows just how gullible the Glee gal, 25, can be. 

The actress is asked by a friend to assist in helping her pal’s grandfather while his caretaker is giving medical instructions on the phone, but what she’s asked to do is unconscionable. Little does she know that fellow actress Hayden Panettiere is behind the entire thing!

This isn’t the only celebrity that Hayden punks…

From Zac Efron to Nicole “Snooki” Polizzi, the Heroes star, 22, is getting good at this. The episode airs tonight, April 12, on MTV. Do you have any good pranks? Share them in the comments!

Actress Hayden Panettiere was in attendance at a New York Jets match against the Buffalo Bills on Sunday at MetLife Stadium in New Jersey accompanied by her NFL beau Scotty McKnight, who is a wide receiver for the Jets. Although her boyfriend is currently on the injured reserve, that didn’t stop Hayden, 22, from cheering on her man’s team. 

These were just two of four tickets the Scream 4 star had. As for the other two, Panettiere had them auctioned off for a chance to attend the game with her. She and McKnight hung out with the winner and their guest in the front row as they rooted for the home team with Hayden donned in all green. 

Meanwhile, the Heroes actress just wrapped shooting a new drama titled Carmel, which according to IMDB is about a teenager who wanders into Carmel, California, where he is soon introduced to the art-forgery community. Carmel is due for a March 2012 release and also stars Hunger Games actor Josh Hutcherson.

The Irish young man ran onstage completely nude, offering up an eyeful for both Hayden and the live audience. The stunt may have been staged, however, because Hayden carried herself rather calmly when the streaker hit the stage and no security guard attempted to stop him.

“I’m a big fan,” the guy told Hayden when she allowed him to speak into the microphone.

“Thank you, you should come grab a pint with us after,” the actress responded.

The streaker said he would “love that,” telling Hayden, “Um, I don’t have my phone on me, though. You know what? I’ll just leave you to it, and I’ll see you at the aftershow?”

Watch the video at your own risk and let us know in the comments what you think: Was this stunt staged or impromptu? 

Some of the young actors who were being honored for their help and work on behalf of many great organization and causes, were Chloe Moretz, Hailee Steinfeld, Darren Criss, Hayden Panettiere, Bailee Madison, Angus T. Jones and Rico Rodriguez. Each honoree gave a brief speech thanking their organization and cause while letting us know more about how we can help. Variety Power of Youth’s goal is to encourage the young entertainers of this generation to help and support humanitarian and charitable causes. With their positions in pop culture they hope to inspire millions of young adults to do the same.

Celebuzz got a chance to speak with Hayden, who was being honored for her work with The Whaleman Foundation, and the 22-year-old actress told us:

“If all life on land would be wiped out it would only be a matter of time before life reemerged from the ocean, but if all life in the ocean was wiped out it would eventually die off.” She also told us “it’s good to show kids that they can give back and they can make a difference.”

charitable celebs!

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Modern Family’s Rico Rodriguez told us about his start with the Camp Ronald McDonald for Good Times  “I really got inspired by the powerful kids there who are fighting for their lives. I just wanted to continue that and I wanted to bring awareness to the cause.”

Many other young stars attended the event such as Kat Graham from Vampire Diaries, who gave us some scoop about a new character soon to be appearing on the show! Some other stars who attended include Desperate Housewives’s Andrea Bowen, Internet sensation Rebecca Black, Modern Family’s Nolan Gould,  and many more.

The 22-year-old beauty was all smiled as she stopped to pose for photos on the star-studded red carpet (with those legs, can you blame her?), which also included an appearance by co-star Julia Roberts.

After a number of delays, Fireflies in the Garden finally hts theaters this Friday. In it, Hayden plays a younger verison of two-time Oscar nominee Emily Watson.

What do you think of this look? Was silver the right choice for Hayden? Or should she have picked something else?

A Playful Hayden Panettiere Flies Out of Washington, DC

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]]> http://www.celebuzz.com/2011-10-13/hayden-panettiere-sleek-in-silver-at-la-premiere-of-fireflies-in-the-garden-photos/feed/ 5 http://www.celebuzz.com/2011-09-17/hayden-panettiere-wears-no-makeup-in-d-c-photos/ http://www.celebuzz.com/2011-09-17/hayden-panettiere-wears-no-makeup-in-d-c-photos/#comments Sat, 17 Sep 2011 23:12:28 +0000 Amber James http://www.celebuzz.com/?p=8811722 A fresh-faced Hayden Panettiere was all smiles as she arrived at the airport in Washington DC before her departure on Saturday afternoon. Wearing a grey shirt and jeans, she kept her style causal. The Heroes actress was in town to get honored by the DC mayor, Mayor Vincent Gray, who proclaimed Friday as “Hayden Panettiere...Read more»]]> A fresh-faced Hayden Panettiere was all smiles as she arrived at the airport in Washington DC before her departure on Saturday afternoon. Wearing a grey shirt and jeans, she kept her style causal.

The Heroes actress was in town to get honored by the DC mayor, Mayor Vincent Gray, who proclaimed Friday as “Hayden Panettiere Day.” The 22-year-old actress, who is a spokeswoman for the conservation campaign Save the Whales Again, was honored for her advocacy. During the event, she told the press:

“It doesn’t get much cooler than that. It’s a huge honor. We’ll continue just chipping away at the problem and trying to fix it.”

Meanwhile, she has spotted all over the world. Most recently, she hit up the 2011 FanExpo to meet some of her biggest fans. Hayden was spotted at the sci-fi, comic book and horror movie convention in Toronto wearing a black leather jacket, low-cut top and jeans, she arrived with an entourage behind her.

Hayden%20Panettiere%20Heads%20to%20the%202011%20FanExpo

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]]> http://www.celebuzz.com/2011-09-17/hayden-panettiere-wears-no-makeup-in-d-c-photos/feed/ 4 http://www.celebuzz.com/2011-08-29/hayden-panettiere-rocks-leather-at-2011-fanexpo-photos/ http://www.celebuzz.com/2011-08-29/hayden-panettiere-rocks-leather-at-2011-fanexpo-photos/#comments Mon, 29 Aug 2011 14:39:08 +0000 Amber James http://www.celebuzz.com/?p=8649692 Why so serious, Hayden Panettiere? The Heroes actress was spotted out and about in Toronto this weekend, when the paparazzi snapped her heading to the 2011 FanExpo held at the Metro Toronto Convention Centre. Wearing a black leather jacket, low-cut top and jeans, she arrived with an entourage behind her. Hayden decided to meet some...Read more»]]> Why so serious, Hayden Panettiere? The Heroes actress was spotted out and about in Toronto this weekend, when the paparazzi snapped her heading to the 2011 FanExpo held at the Metro Toronto Convention Centre. Wearing a black leather jacket, low-cut top and jeans, she arrived with an entourage behind her.

Hayden decided to meet some of her biggest fans at the sci-fi, comic book and horror movie convention. According to UK’s Daily Mail, the young actress set up a booth and charged $30 for an autograph and $45 to have a picture taken with her.

The star has been keeping a low profile lately. She was spotted earlier this summer looking glamorous on the red carpet at the premiere of Klitscko in New York. She dazzled in a little black, backless dress.

Hayden Panettiere Dazzles in Backless LBD

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]]> http://www.celebuzz.com/2011-08-29/hayden-panettiere-rocks-leather-at-2011-fanexpo-photos/feed/ 5 http://www.celebuzz.com/2011-08-21/happy-birthday-hayden-panettiere-photos/ http://www.celebuzz.com/2011-08-21/happy-birthday-hayden-panettiere-photos/#comments Sun, 21 Aug 2011 12:00:01 +0000 Derek Schauer http://www.celebuzz.com/?p=8572561 Hayden Panettiere has something to celebrate this weekend, as she rings in her 22nd birthday! The petite actress has a wide variety of interests, so we can’t even begin to speculate how she might spend the big day. While she is best known for her role on the superhero TV series Heroes, Hayden is actually...Read more»]]> Hayden Panettiere has something to celebrate this weekend, as she rings in her 22nd birthday! The petite actress has a wide variety of interests, so we can’t even begin to speculate how she might spend the big day.

While she is best known for her role on the superhero TV series Heroes, Hayden is actually a Hollywood vet! You can spot her as a young girl in Remember the Titans and she acted in soaps for years as a child. Most recently, she sported a fresh short hair cut in the outrageous Scream 4.

Off the screen, Hayden is an outspoken activist for animal rights, and she appeared in the documentary The Cove about fighting to end the slaughter of dolphins in Japan. She has also been active in organizations that work to prevent teen pregnancy.

She has had a few high profile relationships over the last few years, although she broke up with mammoth boxer Wladimir Klitschko earlier this year. Hayden has also been connected to Laguna Beach star Stephen Colletti and dated her Heroes co-star Milo Ventimiglia. We have a feeling someone as beautiful and passionate as Hayden won’t be single much longer!

For more on Hayden Panettiere and celeb birthday updates, be sure to keep an eye on our Twitter, Facebook, and Tumblr!

Panettiere has been involved in the effort to save the world’s endangered whales and dolphins since she was 15 years old. Now 22, she’s the spokesperson for the Whaleman Foundation, which fights to protect whales and dolphins from climate change, pollution, entanglements in fishing nets, and the expansion of whaling.  

Panettiere says of her involvement with the Whaleman Foundation:

“I’m an activist who’s aware of what’s realistic to achieve and what’s not.”

hollywood's most charitable celebs

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Panettiere traveled to Taiji, Japan, in 2007 with documentarian Louie Psihoyos and a team of ninja surfers for the Oscar-winning documentary, The Cove. She tells Condé Nast Traveler:

“We knew we were up against a huge obstacle in Taiji. In the course of the slaughter, I saw a species in need. The trip inspired me to continue the fight.”

If you would like to join in on the actress’ movement to save the endangered sea life, visit the Whaleman Foundation website to find out how you can help!

The actress showed off the shorter style at Neutrogena’s 2nd Annual Wave for Change event where she was all smiles posing alongside Heroes star Hayden Panettiere. Though V-Hud, 22, looked gorgeous and mature with her new look, she’s been looking a little grungy on set of her new film Gimme Shelter. 

v-hud gets sexy for candie's

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V-Hud gushed all about her new make-under on her Facebook page, writing:

“I’m so excited and proud of the work I’ve been doing and let me tell you, you all are going to be SHOCKED with how I look in this movie. It’s crazy sauce.”

Sporting short hair and baggy jeans and layered-tomboy threads, Vanessa plays a pregnant teenager who is turned away by her Wall Street father (Brendan Fraser) because she refuses to get an abortion. Forced into the streets, she embarks on a journey of survival. Check out the pics below. 

v-hud goes grunge for new movie

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]]> http://www.celebuzz.com/2011-07-19/vanessa-hudgens-shows-off-short-hair-alongside-hayden-panettiere/feed/ 9 http://www.celebuzz.com/2011-06-08/stars-who-got-their-start-in-the-supernatural/ http://www.celebuzz.com/2011-06-08/stars-who-got-their-start-in-the-supernatural/#comments Wed, 08 Jun 2011 12:00:01 +0000 Celebuzz http://www.celebuzz.com/?p=7841202 Vampires, and wizards and aliens! Oh my! No, it’s not time for another supernatural film … yet. It is time, however, for a trip down memory lane with our favorite celebs that have made us sit on the edge of our seats with fright and suspense. Sarah Michelle-Gellar had us rooting against vampires before they...Read more»]]> Vampires, and wizards and aliens! Oh my!

No, it’s not time for another supernatural film … yet. It is time, however, for a trip down memory lane with our favorite celebs that have made us sit on the edge of our seats with fright and suspense.

Sarah Michelle-Gellar had us rooting against vampires before they became popular, Daniel Radcliffe, Emma Watson, Rupert Grint, and the rest of the Harry Potter cast captured our attention as they gave us an inside look to their wizarding ways, and Hayden Panettiere proved to us that not all popular cheerleaders are ditsy blonds.

Take a look at which stars got their breakthrough roles during their appearances in some of the most famous supernatural movies and television shows to date.

Which one is your favorite? Hit up our Twitter and Facebook pages and let us know!

“Even though we’ve decided splitting up is best for both of us, we have an amazing amount of love and respect for each other and remain very close friends,” Hayden exclusively told People.

Hayden and the Ukrainian heavyweight boxing champion most recently appeared together at the Tribeca Film Festival for the premiere of Klitschko, a documentary about Wladmir and his brother Vitali’s boxing careers.

Despite the split, Wladmir admits he has a great respect for Hayden and wishes her all the best. “We had a great time together, but it’s not that easy to manage a relationship between two continents,” he said. “I have a lot of respect for Hayden as a person and as a friend, and I believe we’ll keep our friendship even after the separation.”

Simpson looked incredible as she hit the red carpet in a short and sassy patterned dress, showing off her tan and toned legs.

Also in the house for the event: Jessica Szohr, who was sporting some new bangs, Lauren Conrad looking lovely with her hair up in a bun, Joe Jonas, our pal Whitney Port and many more.

Hayden Panettiere, who was still in town for the premiere of her squeeze’s documentary Klitschko, also was in attendance.

The bubbly young blonde actress stole the show at the Tribeca Film Festival premiere of Klitschko, a documentary about her boyfriend — boxing phenom Wladimir Klitschko and his brother Vitali. Showing as much skin as a boxer might during a match, Panettiere turned and posed her way down the red carpet in a strappy and backless little black dress with her hair up in an adorable triangle-shaped pony.

It’s been a busy month for Hayden, who shrieked her way through a role in Scream 4. She also appeared as the cover girl for Vegas magazine. In an interview with the mag, Hayden says she’s looking to expand her resume and get a little bit edgier with her roles.

“I was always a rebel, everything I wasn’t supposed to do I wanted to do, so the darker for me, the better. There are no boundaries. I like to step in the places that are a little bit more dangerous,” she said.

The 21-year-old blonde bombshell told the mag:On turning 21: “My friends are definitely stoked to exercise my right in Vegas,” she laughs with a laugh. “I love the feeling of Vegas, like you just walk into a wall of fun.”

On bonding with Scream 4 co-star Neve Campbell: “It was like summer camp. Neve [Campbell] had this cottage that she rented, and she would invite everyone over. We’d spend the weekend there all together and barbecue, that kind of stuff.”

Hayden's bikini beach time

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On her post-Heroes roles: “I was always a rebel, everything I wasn’t supposed to do I wanted to do, so the darker for me, the better. There are no boundaries. I like to step in the places that are a little bit more dangerous.”

Check out more when the magazine hits stands later this month, or visit VegasMagazine.com!

The Heroes beauty got a couple of licks from an over-excited pit bull who was chained up near the star’s chair. It’s easy to see why the dog couldn’t resist licking Hayden’s face – the petite actress looked stunning in a low-cut pink top and leggings.

Maybe the dog was merely a fan of Lifetime Original Movies? Hayden’s latest film, Amanda Knox: Murder on Trial in Italy, premiered on Lifetime on Monday, February 21.

What do you think of Hayden’s doggy love? Check out more pics and share your thoughts in the comments.

Held at the Circa 55 at The Beverly Hilton Hotel, the HBO party is just one of the many soirees that the stars hit up last night (including the handsome British duo of AGarf and RPattz).

If you wanna see what other stars crashed this bash, check out the gallery!

The former Heroes cheerleader was in Italy on Wednesday, preparing to film her upcoming movie The Amanda Knox Story. Panettiere will be playing the title character, an American exchange student who was convicted of murdering her roommate in Italy in 2007.

Hit up the photo gallery to see Hayden get ready for a killer time. And after that, make sure to drop by Celebuzz’s Actors on Set gallery to see more of your favorite celebs put in a hard day’s work.

The former Heroes cheerleader put her boosterism skills to the test in Hamburg, sitting ringside to watch her boyfriend Wladimir Klitschko‘s brother, Vitali Klitschko, battle Shannon Briggs during a WBC heavyweight title bout. Hayden proved to be an effective good-luck charm, as Klitschko went on to win the fight—even if, judging from Hayden’s expressions during the match, there were a few hairy moments on the path to victory.

Float like a butterfly into our photo gallery to see Hayden at Fight Night. And make sure to hit up Paparazzi-Razzi for more spine-tingling pics of your favorite celebs in action.