Exclusive: Christina Aguilera's Birthday: The Bash, Cake and More Revealed!

Not seen during the festivities was Aguilera's son Max, who turns five in January, and her boyfriend Matthew Rutler, a musician and production assistant she met on the set of Burlesque in 2010. Bad Santa: The star covered her blonde bob with a festive

Christina Aguilera wears a Santa hat while leaving a late night birthday party on Tuesday (December 18) in Los Angeles. The 32-year-old The Voice coach wore a long coat over her Mickey Mouse t-shirt and fishnet stockings. Earlier in the evening

View Pics Christina Aguilera Credit: Jon Kopaloff/FilmMagic. Another year older and Christina Aguilera still hasn't run out of new hairstyles to try! Sharing the sam birthday as Brad Pitt, 49, and Katie Holmes, 34, the "Your Body" singer turns 32 on

23,. Jeff Kravitz/Getty Images. You may have noticed them on "Mad Men," starring in their own sitcoms, or rocking the red carpet at the American Music Awards: curvy women, from Christina Aguilera to Christina Hendricks, are raising their profile in

We totally get that not every woman wakes up camera-ready like Kim Kardashian. But when a part of a celebrity's budget is allocated to professional hair and makeup artists, there's no excuse for stepping out on the red carpet