Britney Spears' new single is due out on radio next week -- but we've got the full song, "Till the World Ends," right now!
A snippet of the song, co-written by Dr. Luke, Max Martin and Ke$ha, was posted on Amazon.de today, along with cover art of the single. Hours later, the full thing popped up on ThatGrapeJuice.
Of the song, Ke$ha told Spin "That song is me imagining her and any female musician touring the world. You know, when you go out, and you're having an amazing, magical night and you don't want to go to sleep and you want it to last until the world ends."
Listen to the song above -- and check out Brit's sexy, topless pics in V Magazine here!