7. Charli XCX
Charlotte Aitchison is just 20, but the English singer has been making music for years already: she began recording as Charli XCX when she was 14. She's spent the intervening years honing a twisty, gleaming synth-pop sound on a string of singles and free mixtapes. She will release her major-label debut, True Romance, on April 16th, followed by an extensive tour supporting Ellie Goulding across Europe and then Marina and the Diamonds in the U.S.