Celeb Sightings: Brittny Gastineau's Make Out Booth Fun (PHOTOS)
In other celebrity sightings news...
• Fashionistas Mary-Kate and Ashley Olsen hit up Las Vegas this weekend for a friend's bachelorette bash. The girls started the night at Yellowtail Japanese Restaurant & Lounge at the Bellagio before heading to GOLD Boutique Nightclub & Lounge inside ARIA Resort & Casino. An insider tells Celebuzz, "The girls celebrated their friend's bachelorette party Sin City style, dancing and requesting songs from the DJ and singing along when their tracks came on."
• Mary-Kate and Ashley Olsen weren't the only siblings celebrating a recent engagement this weekend. On Sunday night, Mark Ronson headed to The Bank Nightclub to celebrate his bachelor party with close friends and sister. Samantha Ronson got behind the tables to kick off the night's festivities.
• Entourage actor Jerry Ferrara showed off his weight loss while out celebrating his girlfriend Alexandra Blodgett's birthday at The Beverly in Los Angeles. The couple cuddled up and partied the night away after being joined by his fellow cast mates, Emmanuelle Chriqui and Kevin Connelly.
• On Friday evening, Brooklyn Decker and her husband, tennis player Andy Roddick cozied up at Nobu in Southampton. Meanwhile at another table, Spin Crowd star Jonathan Cheban chowed down and was overheard by onlookers that he planned to meet up with Kris Humphries afterwards. Guess the basketball player is getting in some more bachelor time before he walks down the aisle with Kim Kardashian.