Anna Kendrick will be the first to tell you she's not really a musician; she just plays one on the big screen. Her humility belies the mezzo-soprano belt that drove the actress' cover of "Cups" from Pitch Perfect, the 2012 hit movie about a cappella competitions, to No. 6 on the Hot 100. That success has helped anoint the 29-year-old this generation's Julie Andrews -- the go-to belle for every female musical lead, including in Pitch Perfect 2 (out May 15), The Last 5 Years and Into the Woods (both out now). Off-camera, she's not far removed from her theatrical persona: the acerbic underdog, constantly downplaying her talents -- on the musical side, at least: "It's so striking that I am an amateur among pros."