Love comes and goes in a heartbeat in Hollywood — and with so many star couples hooking up and breaking up, it’s often difficult to keep track.

Can’t get enough of Adrienne Maloof and Demi Moore‘s much younger boy toys?

Have you found yourself asking: Are Haylor ever getting back together? Like…ever?

No need for heartache: we at Celebuzz have compiled a roundup of the most noteworthy relationship stories from this week, along with some expert commentary from Wendy Walsh, Ph.D., author of The 30-Day Love Detox (available from Rodale in April) and resident expert at DatingAdvice.com.

From newfound romances to famous serial daters and more — here’s the latest report from the celebrity lovelines.

Taylor Swift & Harry Styles

After parting ways during a blowout fight in the Virgin Islands, the “I Knew You Were Trouble” singer sparked rumors of a possible reunion with One Direction heartthrob when she unexpectedly flew to London for a “showdown meeting” with her ex. The former flames are also slated to both attend the NRJ Music Awards in Cannes, France this weekend.

Dr. Walsh’s opinion:

Dear Taylor Swift: I thought you were never, ever getting back together? What happened to that promise? Huh? Huh? Oh [yeah], only if it is good for record sales. By the way, I’m not against publicity ships. In fact, I kinda like the idea of Haylor. But the problem here is you two are being just too [obvious]. I mean, parading around a public photo opp wearing Mr. Styles’ shirt, just days after he wore it himself? Even naive 14-year-old girls knew it was a publicity stunt. My advice to you: Find a non-famous dude who is your own age, your own ball size and your own moxie. And stop dating teenagers.

Adrienne Maloof & Sean Stewart

The Real Housewives of Beverly Hills star raised eyebrows as she started a shocking romance with rocker Rod Stewart‘s son, just months after divorcing her ex Paul Maloof in November. Did we mention the younger Stewart, 32, — who’s gained a notorious bad boy rep — is almost 20 years her junior? Yup. “This started as a business relationship and now we’re casually dating,” Maloof, 51, told People.

Dr. Walsh’s opinion:

This is nothing to make headlines in this age of the cougar, unless you consider fame and money. Maloof, a current reality star, is reported to be worth $100 million and Stewart, 18 years her junior, has exactly two TV credits under his belt: ‘Sons of Hollywood’ and ‘Celebrity Rehab’. Enough said. Maloof will get exactly what she wants from this relationship: more publicity. And Sean will get what he is accustomed to: a celebrity parent keeping him in the lap of luxury. Will Maloof be heartbroken when her boy toy leaves for greener pastures? Only if the two are smart enough to drop the veil of celebrity and develop a real emotional attachment. My advice: hunker down in a non-tinsel town enclave and really get to know each other. You might find you like more than the show.

Demi Moore & Harry Morton

Move over, Lindsay Lohan. After a string of relationships following her divorce from Ashton Kutcher, Moore has possibly found love once more — this time with LiLo’s former beau, Harry Morton. The actress and Morton — a successful restaurateur — “have been seeing each other for a few months,” according to E! Online.

Dr. Walsh’s opinion:

Dear Demi Moore: I agree that 31-year-old Harry Morton is hot. And yes, he’s a great little trophy to sport while you are licking the wounds cut by Ashton. But he’s a temporary salve, girlfriend. This one, like the last PYT, is destined to sow his young manly oats somewhere, someplace, someday. And then you’ll be left again with the reality of life. Know this: Your power is your talent, your wisdom, and your heart. Don’t let an artificial town give you artificial self esteem. Your girls club knows that sexual power is pretend power anyway. When you are brave enough to tackle a peer — yes, a male with as many foibles and strong scars as you, then you will find your true strength.

Do you think Demi and Harry are in it for the long run? What about the others? Sound off in the comments section, below!

Jennifer Aniston was recently spotted having dinner with a “mystery man.” Who could this lucky lad be? Turns out it was none other than Lindsay Lohan‘s ex-boyfriend, Harry Morton.

The pair were spotted having dinner and drinks at the Sunset Tower Hotel earlier this week. According to an eyewitness, the two were flirting and Jen looked “a little nervous” and “laughed at everything [Harry] said.”

Harry, 29, is the heir to the Hard Rock Cafe and founder of the Pink Taco restaurant chain. Harry has dated young starlets like Lindsay and Hayden Panettiere, and has now reportedly moved on to a 41-year-old superstar like Jen.

If the two are a real item, this wouldn’t be the first time that Jen has dated a younger man: Jen’s ex, John Mayer, was nine years her junior.

News of Jen and Harry comes hot on the heels of a rumor that the star had hooked back up with John. The singer shot down the rumors on his personal blog.

Harry and Lindsay split in 2006.

Do you think Jen is really dating Harry? Share your thoughts in the comments below.

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Sorry, gentlemen; it appears that Hayden Panettiere is once again off the market.

The New York Post reports that the Heroes cheerleader has landed herself a new guy, in the form of restaurateur Harry Morton.

Panettiere—who was most recently linked with British TV host Steve Jones—and Morton—who owns Pink Taco and is the son of Hard Rock Cafe honcho Peter Morton—enjoyed a romantic dinner at Madeo in Los Angeles on Monday, and were spied at the beach in Malibu together on Wednesday.

Hope Morton is prepared, because to hear Hayden tell it, he’s in for a wild, naked time.

Let us know in the comments section: How long do you give Hayden Panettiere’s latest relationship?

Photo Source: WireImage/Getty Images

Now that the cat’s out of the bag, Lindsay Lohan doesn’t have to sneak around with Samantha Ronson anymore. The couple was recently seen holding hands in public after their relationship was confirmed.

Observers haven’t seen LiLo this happy and head-over-heels in a long time. She may be getting ready to finally settle down. It’s been a long and tough journey through the meat market for the poor girl, and it’s time to let go of her past.

But here’s a trip down memory lane with the Top 10 Lohan Hookups! The lucky fellows are ordered from oldest to most recent encounters.

Let’s hear your opinions in the comments; who are you most surprised about?