All-Star "We Are The Champions" - Jimmy Fallon, Carrie Underwood, Ariana Grande, Sam Smith, Usher, One Direction, more

In honor of the Super Bowl, Jimmy 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."

(h/t JMG)

Justin Bieber and Usher at The Today Show

For some reason, Justin is looking like Hilary Swank in "Boys Don't Cry" to me here.