After nearly four months off the air one of our favorite series Glee is finally returning for its season premiere on April 13–with Broadway veterans Jonathan Groff (Spring Awakening) and Idina Menzel (Wicked) joining the cast to boot! The season’s second episode will feature only Madonna music, with the McKinley High students belting out such Madge classics as “Express Yourself” and “Like a Prayer.” Now word is out that Glee is featuring the music of Lady Gaga in an upcoming episode. But which of today's chart toppers should be honored next? Whose songs do you want to hear Rachel, Finn, Kurt, Mercedes and the rest of the Glee crew belting out?