Taylor Swift and Zac Efron Sing a Duet!

Taylor Swift and Zac Efron Sing a Duet! This incredible duo teamed up to perform an original song for Ellen! They may not have had a lot of rehearsal, but it's clear that this is one musical combo it would be great to hear a lot more of. Adele joins Jimmy and The Roots in the Tonight Show Music Room to perform "Hello" with classroom instruments.