Comeback singer Britney Spears is reportedly furious after topless pictures of her have been leaked online. In the saucy shots, a grinning Spears poses outside, kneeling on a rock, while holding two flowers over her nipples. And the singer is furious about the timing of the pictures - she has just embarked on a comeback trail, performing live in a series of comeback gigs this week (begs01May07) in California. A close pal of the singer tells British newspaper 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."