Jimmy Fallon, The Roots, and Music Superstars Sing “We Are The Champions”

In honor of the Super Bowl, Jimmy Fallon and the Roots join Carrie Underwood, Sam Smith, Ariana Grande, Blake Shelton, Usher, Meghan Trainor, One Direction and Christina Aguilera for an a cappella version of “We Are The Champions.”

http://youtu.be/KHHqPTQDIlo