The unlikely duo may shock the world, but the remix is hot! R. Kelly has done a lot of different types of music, but this is the first time he has crossed over into the pop category. He teams up with female trio Britney Spears, Nicki Minaj and Ke$ha for the “Till the World Ends” official remix.  The single is from Britney’s seventh studio album, “Femme Fatale”. Hear the song below: