Britney Spears, Nicki Minaj, Ke$ha debut 'Till The World Ends' remix cover art

till-the-world-ends-remix-art.jpg Nicki Minaj and Ke$ha may have lent their voices to Britney Spears' "Till The World Ends" remix, but they apparently couldn't get it together for a photo shoot.

Photo/Video credit: Britney Spears