Fansite WorldOfBritney.com is hosting the "It's Britney, Bitch" contest to commemorate Britney's 10 amazing years on the pop music scene! The challenge features riddles, photo hunts and quizzes and will take place NOW through Nov. 10. Prizes include the much-anticipated The Singles Collection Box Set, The Singles Collection standard edition CD and Britney's latest fragrance, Circus Fantasy. It's not too late to try and win, head over to WorldOfBritney.com for details.

PS Is your Britney fan site doing something cool to celebrate the release of The Singles Collection? Contest, new layout, etc.? Email me at britneydotcom@gmail.com, and you might see it featured here on the site!