Sep 27, 2010 20:41 GMT  ·  By

Christina Aguilera is famous for her tiny and tight body, which she would often show off in the most ridiculously small outfits. During a recent appearance, the singer rocked some major curves, sparking talk of weight gain.

While photos of the singer at a recent event in LA would probably say nothing to the untrained eye about her weight, side by side comparisons with pics taken earlier this year show a considerable weight gain.

Not that Christina doesn’t look good anymore (some could argue she’s even more attractive with curves than stick thin), but it’s surprising to see her gain so much weight in such a short time, the Daily Mail says.

“Only in June the 29-year-old mother of one was pictured performing at an NBA Finals game in LA and was in great shape,” the tab writes.

“And back in January she was even skinnier, looking rail thin as she attended a party in Las Vegas with friend Nicole Richie,” the same publication writes.

“But over the past few months the star has ballooned. She now has a much curvier physique and fuller face, appearing to be the heaviest she’s ever been, barring her pregnancy in 2008,” the Mail says.

Indeed, not only does her face look rounder, but her arms and hips are also fuller, while she also seems to be sporting a little tummy, the same report argues.

Admittedly, even her friends were startled about her weight gain, especially since she worked on “Burlesque,” a movie that sees her as a burlesque dancer.

“It’s bizarre Christina has put on so much weight as she’s been doing lots of dancing and high energy work for Burlesque,” the Mail quotes an unnamed source as saying.

“The whole movie is choreography and she was very active so I’m surprised she’s piled on the pounds so quickly,” the same insider explains.

Also thanks to side-by-side photo comparisons, it is believed Christina is now 1 stone / 14 pounds / 6.3kg heavier. Fans should probably expect to hear rumors about her being pregnant to pop up any minute now.