Christina Aguilera's Weight Worry

Pop superstar Christina Aguilera's "obsession" with being thin is beginning to worry her caring pals.

The Dirrty singer has made losing weight her New Year's resolution, despite having already shed the pounds.

An insider tells Scotland's Daily Record newspaper, "I know it's something almost everyone says at New Year but in Christina's case it's no joke.

"She lost so much weight recently her friends and family are getting concerned that it's becoming an obsession with her.

"She's vowed not to pig out over Christmas and to start her new diet regime early. If anything, she could do with putting on a few pounds because her world tour is taking it out of her."