Christina Aguilera Shocks Fans With Weight Gain - What is the Singer Up To?

Performing at the recent Michael Jackson tribute concert in Wales, pop superstar Christina Aguilera surprised fans with her appearance, according to Radar. The petite singer appeared to have put on a lot of weight and was squeezed into an unflattering, skimpy leotard and fishnet stockings. Her blond mane was messy, and though she strutted around the stage with confidence, she didn't quite look like her usual self. What's the diminutive star been up to lately?

Working on "The Voice." The 30-year-old is focused on her gig as a celebrity mentor on NBC's singing competition reality show "The Voice." The show's second season launches in February, but NBC is already denying rumors that the network plans to fire the "Beautiful" singer, according to Access Hollywood. Rumor has it that the Grammy-winning singer isn't fulfilling her responsibilities to coach the contestants on the show. Instead she just hangs out with her boyfriend on set.

Recovering from a hacking scandal. Celebrity photos are especially sought after, and people will do anything to get them, including stealing the pictur! es. The former Disney star had photos of hers stolen and posted online, according to Us. And she's not the first celeb to have this problem. Scarlett Johansson is also a victim of hackers who stole and posted naked photos of the actress online.

Feuding with Kelly Osbourne. This is one heated rivalry. The two blonde stars are both very opinionated, and the new cast member on E!'s "Fashion Police" doesn't spare any punches when it comes to dissing the "Burlesque" star's style. The 26-year-old Brit called the pop diva fat, claiming that the singer picked on the younger star about her weight for years, according to Us. We'd love to see these ladies hash the drama out face to face!

Dealing with child abuse rumors. A shocking paparazzi photo sparked an online controversy late in the summer when the star's 3-year-old son was photographed with a painful-looking black eye, according to Us. A rep for the singer dismissed any abuse claims, saying that Max, the singer's child with ex-husband Jordan Bratman, simply fell down in the park.

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