Could there be a reason her performance sucked so bad?

From the AP:

“Somewhere, Kevin Federline is laughing.

An out-of-shape, out-of-touch Britney Spears delivered what was destined to be the most talked about performance of the MTV Video Music Awards — but for all the wrong reasons. Kicking off the show Sunday night with her new single, “Gimme More,” Spears looked bleary and unprepared — much like her recent tabloid exploits on the streets of Los Angeles.

She lazily walked through her dance moves with little enthusiasm. It appeared she had forgotten the entire art of lip-synching; and, perhaps most unforgivable given her once taut frame, she looked embarrassingly out of shape.

Even the celebrity-studded audience seemed bewildered. 50 Cent looked at Spears with a confused expression; Diddy, her new best friend, was expressionless.

Some comeback.”

X17 is reporting that there may be a reason why Britney looked so odd on stage. Take this with a grain of salt – X17 has their nose so far up Brit’s a** – well, you get the picture.

X17 has uncovered the truth behind Brit’s less than energetic performance tonight.

Check it out — we’re all wondering why Britney looked like she was doing a dry run rather than a full-on VMAs gig tonight and X17 has the answer!

A source tells X17 Brit found out about Sarah Silverman’s crappy line about Britney’s babies just moments before she took the stage to perform “Gimme More.” Needless to say, Britney was PISSED! … as any mom would be. Britney was so upset she walked through her performance just to get it over with (despite encouragement from her friends, including Sam who was apparently yelling at Sarah backstage) to skip out on it all together). She held up her end of the bargain and got a major slap in the face from Sarah.

Chin up, Brit — you’ll rock our worlds when you’re ready and Sarah’s dating Jimmy Kimmel — how great can her life be …

Chin up Brit?!? C’mon now…