Jimmy Fallon Out-Blake Sheltons Blake Shelton In Epic 'Tonight Show'/'The Voice' A Cappella Mashup!

Jimmy Fallon and The Roots joined forces with Kelly Clarkson, Jennifer Hudson, Adam Levine and Blake Shelton (don’t forget Carson Daly!) for a monumental a cappella mashup of The Voice coaches’ biggest hits. TBH, Jimmy might actually make a better Blake Shelton than Mr. Stefani himself. Watch (above)!