Admit it you wrote Ke$ha off as a one-hit-wonder after the mind-numbingly catchy "Tik Tok" became the first No. 1 song of 2010. But guess what? It's almost 2011, and the pop singer you love to hate now has five Top 10 hits on her hands, including "We R Who We R," which debuted at No. 1 on Billboard earlier this month. This latest smash is the first single from her new EP, Cannibal, the follow-up to her double-platinum debut, Animal.