Britney: Can She Pull It Off? She's Nervous, Y'all!

Warm mess Britney Spears is set to get the party started tonight at MTV's Video Music Awards. While she's a VMA vet -- who could forget the Madonna kiss or her snake-charming "I'm a Slave 4 U" number? -- her nerves appear to be getting what's left of the better of her.

On Friday night, after a lengthy rehearsal, Brit-Brit headed out to the Hard Rock Hotel & Casino with her entourage. According to 24sizzler.com, a source overhead Britney saying how jittery she was about performing on the awards show.

Given the last year or so of her trainwreckedness, like this and this and this and this and this and this and this and this and this and this, it's no wonder Brit's nerves are causing her nausea. Tonight's performance could be the beginning of a new era for the toppled pop princess -- or yet another whooshing slide down the greased slope toward tabloid horror and the D-list .