Britney Spears holds her best international pop star award at the Bambi Awards in Offenburg, Germany - (11/27/08).

WENN

A source close to one of Britney's bodyguards told Star magazine:

"Britney's diet consists mostly of Taco Bell and turkey jerky washed down
with Red Bull.

"She throws up after meals, both at home and at restaurants and she isn't
very discreet about it. People around her think she's bulimic."

It has also been claimed the 26-year-old star is taking diet pills in order
to maintain her new slim shape.

Another insider revealed: "The pills are like diuretics. She has to go to
the bathroom constantly. It just runs right through her. And everyone knows
she still throws up when she's eaten too much. You can smell it in the
bathroom."

Britney's Back... circus style!

Her performance: