The knockout rounds begin with coaches Christina Aguilera, Adam Levine, Blake Shelton, and Pharrell Williams' strongest team members remaining from the battle rounds. The artists are paired against a teammate once more, but this time they each select their own song to perform individually, while their direct competitor watches and waits. Music phenomenon Miley Cyrus serves as a key adviser and is on hand to work with all of the coaches and their teams as they prepare the artists for this challenge. The coaches alone choose the winner from their team to move on to the live shows and the artist not selected is available to be stolen by another coach. (thetvdb.com)