Britney Spears performance of her new song “Gimme More” at the 2007 MTV Video Music Awards in Las Vegas is getting slammed by critics and fans alike. The out-of-shape pop star more resembled a Vegas impersonator of herself.

The former Mrs. Federline sleep-walked her way through a critical performance of her new single, “Gimme More,” and camera pans to stars like Rihanna, 50 Cent and Diddy showed the crowd wasn’t really feeling it. Britney herself didn’t look too enthused by the ordeal … even seeming to forget the lyrics to her own song!

It looked like she had too much sex with Criss Angel instead of rehearsing their act together.

Get the paddles out because Britney’s career comeback is D.O.A.

Watch the Video by clicking here: Britney VMA Video

To deflect attention from her bad performance Brit exposed her bald eagle na-na once again (NSFW) for the cameras.