By Brandy McDonnell"The Voice" Season 17 coaches Kelly Clarkson, Gwen Stefani, John Legend and Oklahoma country music star Blake Shelton - along with the four-time Emmy-winning show's host, Carson Daly, on guitar - join forces for a lovely and intimate performance of the Extreme ballad "More Than Words" in this digital exclusive:The hit reality singing contest returns for its 17th season at 7 p.m.Read more on NewsOK.com