Ariana Grande & Blake Shelton vs. Kelly Clarkson & John Legend

Jimmy Fallon invites "The Voice" Season 21 coaches – Ariana Grande, Blake Shelton, Kelly Clarkson and John Legend – to appear in a sneak episode of the new music and comedy variety game show. Signature games to be played include "Wheel of Impossible Karaoke," "Perfect Mashup," "Vinyl Countdown" and "Slay It, Don't Spray It."