Music Superstars Sing Queen’s ‘We Are The Champions’ with Jimmy Fallon on ‘The Tonight Show’

To celebrate the Super Bowl, Tonight Show host Jimmy Fallon and The Roots sing an a cappella cover of Queen’s “We Are The Champions” with music superstars Carrie Underwood, Sam Smith, Ariana Grande, Blake Shelton, Usher, Meghan Trainor, One Direction, and Christina Aguilera.