Is it time for Britney Spears’ comeback tour? The singer’s new single, “Till the World Ends,” premiered on Perez Hilton Thursday. “Till the World Ends” is the first single off the platinum artist’s next album, Femme Fatale and was penned by Ke$ha and produced by Dr. Luke and Max Martin. Ke$ha said writing the club-ready track was an “honor.” Femme Fatale will be released March 29.
