Kelly Clarkson In Alexandre Vauthier @ The Voice Season 19 Battles . The blind auditions are over and The Battles are about to begin. At this point, according to NBC, “Coaches will dedicate themselves to developing their team of artists, giving them advice, and sharing the secrets of their success along with the help from their celebrity advisers. During the battle rounds the coaches will pit two of their own team members against each other to sing the same song together in front of a studio audience. “The Voice” is hosted by Carson Daly. Coaches are Blake Shelton, Gwen Stefani, John Legend and Kelly Clarkson.