Last week, Just Jared had the pleasure of stopping by the L.A. studio of super producers Lukasz “Dr. Luke” Gottwald and Max Martin, who are executive producing Britney Spears‘ upcoming album, Femme Fatale. Our heart was dancing as we heard more than half a dozen demos produced by Luke, Max, and their frequent collaborators Ammo and Benny Blanco. Our favorite song was, not surprisingly, a dance song pop phenom Ke$ha wrote for Britney called “Till the World Ends” (produced by Luke, Max, and Billboard). It’s one irresistibly catchy tune that, if it makes the album, will be an instant smash. In fact, we still have the tune stuck in our head - and we can’t get it out. It’s “TiK ToK” all over again!