Spears in tears after VMA show

Britney Spears was reportedly caught crying backstage after her performance at Sunday's MTV Video Music Awards.

An insider told Us magazine: "She was really nervous and knows she screwed up."

Spears' performance at the Las Vegas Palms Casino was dubbed an "embarrassment" by critics yesterday, who claimed the star messed up her lines, looked overweight and appeared "like a zombie" on stage.

One critic writing about the performance, said: "It was little more than an overhyped burlesque show that went splat."