THE VOICE — "The Knockouts Premiere" Episode 2709 — Pictured: (l-r) Adam Levine, John Legend, Kelsea Ballerini, Michael Buble — (Photo by: Greg Gayne/NBC via Getty Images)
LAS VEGAS, NV – Singer Adam Levine of Maroon 5 arrives to perform during a keynote address at the 2013 International CES at The Venetian on January 7, 2013 in Las Vegas, Nevada. (Photo by David Becker/Getty Images)
