Jenna Jameson indulged her sweet tooth with husband Tito Ortiz at Sugar Factory American Brasserie.
Like Father, Like Son
Hugh Hefner and his son Marston celebrated their birthdays at Palms Casino Resort. Hugh blew out birthday candles for the 85th time, while Marston turned 21.
Tye Strickland celebrated turning 30 at The Palazzo over the weekend with his wife Melissa Rycroft by his side.
Going in For Life
On May 29, Lil Wayne and Drake put on a show for fans at Hard Rock Hotel & Casino, performing songs "I'm On One," "Right Above It" and "Miss Me."
Melissa Rycroft and husband Tye Strickland shared a few drinks at Azure Luxury Pool over Memorial Day weekend.
"Dancing with the Stars" pros Maksim Chmerkovskiy and Cheryl Burke cuddled up at Palms Casino Resort on May 28.
How's the Duck?
Scott Disick raises his birthday cake high at Gallery Nightclub in Las Vegas on May 27.
Kendra Wilkinson-Baskett danced with a miniature version of herself on June 11, celebrating her birthday at PURE Nightclub with her husband Hank. Kendra turns 26 on June 12.
Holly Madison celebrated the release of her new book The Showgirl Next Door: Holly Madison's Las Vegas at Gallery Nightclub on June 11.
Vanessa Minnillo looked glam for her bachelorette party at Lavo and Marquee Dayclub at the Cosmopolitan on June 18 and 19. The actress has been engaged to Nick Lachey since November 2010.
Make a Wish
Carmelo Anthony snuggled with his wife LaLa as they celebrated her birthday at TAO on June 18. The actress turns 32 on June 25.
The Early Bird
Heidi Montag arrived at Wet Republic 30 minutes before her friend Crystal Harris on June 18. The two spent their afternoon partying poolside.
On the Lam
"Runaway bride" Crystal Harris spent June 18, which would have been her wedding day, at Wet Republic. "I'm giving [Hugh Hefner] back the ring," said the model. "I just want to move forward." The next day, Hef confirmed that the two have remained cordial, tweeting, "Crystal came by to see how I've been doing. We remain close friends."
Purty Purple Party
Nicole Scherzinger will turn 33 on June 29 and the Pussycat Doll got the celebration started early, partying at Marqee Dayclub and TAO in Las Vegas on June 25.
Making it Rain
Nick Lachey showered friends with champagne during his bachelor party at TAO Beach on July 2. Nick is set to wed Vanessa Minnillo on July 16.
Scott Disick indulged in chocolate fondue at Sugar Factory American Brasserie on July 2. The reality star showed up for dinner with a group that included girlfriend Kourtney Kardashian and Brittny Gastineau.
Adult film star Sasha Grey wined and dined at Nove Italiano on July 2, chatting with friends inside the Garden Terrace Room.
Not-So-New Kids on the Block
Better Late Than Never!
Ashley Tisdale had a belated birthday party at PURE Nightclub on July 15, having turned 26 on July 2.
David Hasselhoff channeled a younger version of himself while celebrating his birthday on July 23, going shirtless at Encore Beach Club. The actor turned 59 on July 17.
Actor Adrian Grenier partied after a screening of his documentary 'Teenage Paparazzo,' his third directorial effort. The "Entourage" star was snapped at Planet Hollywood Resort & Casino on July 23.
Nick Cannon played DJ at the Planet Hollywood Resort & Casino on July 23.
Khloe Kardashian, Kris Jenner, Kim Kardashian and Kourtney Kardashian had a blast at Kim's bachelorette party at TAO on July 23.
The Real Housewives of Beverly Hills cast member Brandi Glanville (pictured right) hosted the Single & Fabulous Party at TAO Beach on August 13, surrounded by a few beautiful friends.
Former Pussycat Doll dancer Carmen Electra partied at Azure on August 13 in a skin-tight snakeskin dress.
Mike "The Situation" Sorrentino and Nick Cannon flaunted their fame at Chateau Nightclub & Gardens on August 13.
DJ Pauly D got the party started at the 4th annual Midsummer Night's Dream party at the Palms Pool & Bungalows on August 13.
The Party Starter
Jersey Shore star Nicole "Snooki" Polizzi fist pumped the night away at LAX Nightclub on August 20.
Hate the Game
Ray J was in first player mode at Chateau Nightclub & Gardens, donning a Mario Bros. pendant that dangled from his neck on August 20. The singer reportedly was not invited to Kim Kardashian's wedding, which took place the same day.
Bachelor Pad 2's "it" couple Vienna Girardi and Kasey Kahl hosted a party at Studio 54 inside MGM Grand Hotel & Casino on August 20.
Kelly Rowland had a lot to smile about on August 27, with her latest solo album Here I Am debuting at No. 3 on the Billboard 200. The singer performed some songs from the album at Chateau Nightclub & Gardens.
Adult film star Bree Olson indulged in a few late-night treats at Sugar Factory American Brasserie on August 26.
Jenni "JWoww" Farley got a smooch from her boyfriend Roger while partying at PURE Nightclub on August 26.
Ready, Aim, Fire!
Holly Madison gasped as Kendra Wilkinson-Baskett prepared to fire a t-shirt gun by the pool at Wet Republic on August 27.
The Man of the Hour
Diddy threw another epic party on September 2, summoning Jersey Shore's DJ Pauly D to spin records at the Palms Casino Resort. Diddy was snapped singing one of Bad Boy's classic hits "Mo Money Mo Problems."
Ray J got patriotic at Gallery Nightclub, putting on a suave performance for partygoers on September 3.
AnnaLynne McCord had a sweet setup at Sugar Factory on September 3, celebrating with friends and a lit sparkler.
Nicole "Snooki" Polizzi snuggled up to her boyfriend Jionni at PURE Nightclub inside Ceasars Palace on September 3.
Mike "The Situation" Sorrentino set off the party at LAX Nightclub on September 3, arriving just after 12:30 a.m. to a packed house.
Back on the Market
Jennifer Lopez did a sexy slow wind at an after-concert party for the iHeartRadio Music Festival at PURE Nightclub on September 24.
Doin' it Big
Nick Cannon co-hosted the first night of Chateau Gardens' grand opening celebration on October 15. The comedian also took the opportunity to celebrate his 31st birthday, which took place October 8.
One in a Milian
Christina Milian enjoyed what may have been the last heat wave of the season by showing off her post-baby body at Azure Luxury Pool on October 15.
Jersey Shore's The Situation launched his Couture Pop at Sugar Factory on October 15, using his signature abs as a major selling point.