Spears kicked off proceedings at the Las Vegas event on Sunday with her new single "Gimme More."
But the performance was viewed by many as a disaster--not the least, it seems, by the troubled star herself.
A backstage source tells Us Weekly, "She was able to see video of herself throughout the auditorium. She flipped out. She came running off the stage, yelling, 'Oh, my God, I looked like a fat pig! I looked like a fat pig!' She was inconsolable."
COPYRIGHT 2007 WORLD ENTERTAINMENT NEWS NETWORK LTD. All Global Rights Reserved.