Britney Spears Furious Over topless pictures !

In the slutty shots, Spears poses outside, kneeling on a rock, while holding two flowers over her nipples.

The singer reportedly is furious about the timing of the pictures -- she has just embarked on a comeback. (shocking)

A gossip tells Britain's The Daily Star, "Britney's furious these photos have become public. She never dreamed they'd be leaked. She's concerned the photos will damage her credibility and just make her look trashy.

"She's concentrating on her career and this draws the focus from her music."

Meanwhile, Britney Spears is trying to loose more weight by doing endless sets, abdominal crunches and taking dance classes reports Star Magazine. The Toxic 'singer' already lost 15 pounds, and now with her tour starting wants to drop more.