Christina Aguilera's performance at the 2011 American Music Awards was larger than life, though overshadowed for fans due to her larger-than-normal size, which fueled more fat and pregnant comments from viewers.

Aguilera performed with Maroon 5 of Moves Like Jagger on Sunday night in Los Angeles for the AMAs wearing a tiny bandage dress by Herve Leger and Christian Louboutin heels. However, critics were not reporting about the big hair she paired with the outfit but how big she looked in the dress.

The reaction to her less-than-flat stomach from many was that 30-year-old Aguilera must be pregnant again, as countless people flocked to Twitter to speculate on her apparent weight gain.

AMAs2011 Christina Aguilera was Rocking a Meatloaf Cummerbund! But her Mammories and Badonka made me want to Do the Discount Double Check! Comedian Huggy Lowdown tweeted.

Christina Aguilera clearly has no one close to her that will tell her the truth, tweeted @RadioAmy, a co-host on the Bobby Bones Show.

The burst of speculations in the blogsphere began just as she was raised onto the stage via the silver podium amidst rumors that Aguilera, mom to one, is pregnant.

Aguilera's last major public appearance didn't help squelch pregnancy rumors, as she wore an ensemble sans pants to the Michael Forever Michael Jackson tribute concert in October.

Kelly Osbourne, a long-time rival to Aguilera, took the opportunity to interject her thoughts on the matter during an episode of Fashion Police.

She called me fat for years, 26-year-old Osbourne said of Aguilera. I was never that fat.

Joan Rivers chimed in saying, Lady Marmalade got into the peanut butter again.

The singer's weight has fluctuated over the years since her days in the Mickey Mouse Club. However, since her recent divorce from music producer Jordan Bratman in October 2010, Aguilera has been sporting a fuller figure.

In Touch Magazine reported a source said Aguilera is in a battle with her body though she has a personal trailer, a dietician and a hypnotist as part of her crew.

Christina hates her thunder thighs, the anonymous source told In Touch, and mentioned she has been hiding behind black clothes recently.

Guess her stylist missed the only black memo for the American Music Awards.