Next up: reality TV. Christina signed on to be a coach on NBC's singing competition show "The Voice," which premiered on April 26, 2011. "I am so excited to be part of such a wonderful project that celebrates music and the talent behind it," she said of the gig. "To be given the opportunity to help shape new artists' careers and mentor them to see their dreams come to fruition is a task I welcome with open arms." The series, which also stars Blake Shelton, Adam Levine, Cee-Lo Green and Carson Daly, was a smash success. Viewers loved the show's innovative style -- and watching the drama Christina brought the panel. She continued on the series through season 3.