The Voice will be back on NBC this fall. Season 21 of the series will premiere September 20. Kelly Clarkson and John Legend will be back along with Blake Shelton, who has been there for every season of the show. Nick Jonas won't be returning. Ariana Grande will be taking over his chair. We'll see if Blake's winning streak continues - last season Team Shelton's contestant Cam Anthony won, giving Blake his eighth victory.