Happy 31st Birthday, Christina Aguilera! (PHOTOS)

Xtina Honors MJ
Christina Aguilera at a Michael Jackson tribute.
Birthday girl Christina Aguilera, 31, has come a long way since her “Genie in a Bottle” days. From being a former mouseketeer on The Mickey Mouse Club with superstar peers Justin Timberlake and Britney Spears, to branching out and becoming one of the top selling artist in the world, it’s no wonder this singer/actress has so much to celebrate.

These days, the “Beautiful” singer is  busy working on the upcoming season of her show The Voice in which she updated fans on Twitter about with the caption that read: 

“Working with TeamXtina on @NBCTheVoice. Can’t wait for you to see the new season its going to be amazing.”

Not only that, but the pop star and mother-of-one is currently dating Matthew Rutler and seems to be as happy as ever! In celebration of Christina’s big day, Celebuzz has compiled a gallery of some of her sexiest looks. Check them out and be sure to wish Christina a happy birthday in the comments!