Gabrielle Union
The actress celebrates her 41st birthday by letting loose with a big bottle of Moet & Chandon champagne and a b-day cake from Lee & Marie's Bakery at Hyde AmericanAirlines Arena.
Nicky Hilton
Paris Hilton helps her sis turn 30 with a big bash at XS nightclub.
Nick Jonas
In celebration of his 21st birthday, the Jonas Brothers member heads to XS nightclub inside Wynn Las Vegas.
Selena Gomez
The singer enjoys a week-long celebration of her 21st b-day. Here, she blows out the candles on her birthday cake while at an event for her fall 2013 Dream Out Loud collection for Kmart.
Kristen Bell
While promoting her Veronica Mars movie at Comic-Con in San Diego, the actress celebrated her 33rd birthday with fans at The Samsung Galaxy Experience.
Tia Mowry
The Style star celebrates her 35th birthday with her super cute son Cree at the LYFE Kitchen Beach House sponsored by Voli Light Vodkas.
Mel B
The Spice Girls singer and hubby Stephen Belafonte celebrate her bday at Andrea's at the Wynn at Encore.
Hailee Steinfeld
The Oscar-nominated actress celebrates her sweet 16 at the Rolling Stone Restaurant Lounge Dec. 15 in Los Angeles, Calif.
Krysten Ritter
The Don't Trust the B---- in Apartment 23 star turns 31 at Las Vegas hot spot The Bank nightclub.
Jesse Metcalfe
The former Desperate Housewives star celebrates turning 34 with fiancée Cara Santana with a bash at Bagatelle L.A.
Selena Gomez
The pop singer celebrated turning 20 after the 2012 Teen Choice Awards with a small dinner at Il Cielo in Beverly Hills.
Betty White
The actress' famous friends Mary Tyler Moore and Carol Burnett were on hand to help her celebrate her big 9-0! Happy birthday, Betty.
Hugh Jackman & Deborra-Lee Furness
The Real Steel actor gets an assist from wife as he blows out the candles on his cake. Find out how he gave back on his big day!
Rupert Grint
The Harry Potter star is all grown up as he celebrates turning 23 at Chateau nightclub in Las Vegas.
Mark Salling
The Glee guy gets some help celebrating from Holly Madison at Marquee Nightclub. Castmate Cory Monteith was also on hand for the festivities at the Cosmopolitan resort.
Melissa George
Australian actress Melissa George rings in her special day with UV Cake Flavored Vodka at D Bar in NYC.
Tony Parker
Eva Longoria's ex-hubby scores a magnum of Veuve Clicquot from Karina Smirnoff as a belated birthday present while partying at Tao nightclub.
Ashley Tisdale
The High School Musical actress parties at PURE Nightclub in Sin City with family and friends including sister Jennifer Tisdale and Hellcats co-star Heather Hemmens. The starlet was in town celebrating her 26th birthday.
Nicole Scherzinger
The X-Factor judge and Pussycat Doll celebrates her 33rd B-day this weekend with girlfriends in Vegas, partying at the Marquee Dayclub until sunset and dining at Lavo and Tao.
La La Vasquez
The TV personality fetes her birthday alongside her hubby, basketball star Carmelo Anthony, at Tao nightclub at the Venetian Resort Hotel Casino in Sin City.
Khloé Kardashian Odom
The reality star turned 27 this weekend in Las Vegas, and on hand to party with her are hubby Lamar, and fellow reality-star-and-athlete duo Kim Kardashian and Kris Humphries.
Chris Brown
The singer celebrates his 22nd B-day bash sans shirt at Pure in Sin City. It's his party and he'll go topless if he wants to?!
Bill Rancic
Best supporting wife Giuliana surprised her hubby, who's turning the big 4-0, with a birthday bash at the Palazzo's Azure pool in Las Vegas.
Levi Johnston
It's all about the Vegas birthdays this weekend, as Bristol Palin's baby daddy marks his 21st with a bash at Paris Casino's Sugar Factory.