Shocker!
Sources are reporting that the second single off of Britney Spears' upcoming album, Femme Fatale, is a track called 'Til The World Ends, which was produced by Max Martin and Dr. Luke, and surprisingly, written by Ke$ha!
Check out a clip of the alleged demo version (above)!
We definitely [...]
Source: http://perezhilton.com/2011-02-23-britney-spears-next-single-called-til-the-world-ends
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