Blake Shelton,John Legend, Nick Jonas and Kelly Clarkson -- with some help from Kelsea Ballerini — making the tough decisions and whittling their teams down for the upcoming KnockoutsET will be tracking the teams throughout the season, monitoring steals, saves and favorites asprepares to crown a season 20 champion. Interestingly, there isn't a reigning champ on this season's coaches' panel, as Gwen Stefani won her first-ever title in season 19 with young crooner Carter Rubin.