‘The Voice’ Coaches Go a Cappella With Their Hits on Fallon (Video)

You can kiss Blake Shelton’s “country ass”

Maybe “The Voice” coaches should officially form an a cappella group. We guess Jimmy Fallon and The Roots can be the backing “band” on tour.

Kelly Clarkson, Jennifer Hudson, Adam Levine and Blake Shelton performed a few of their hit songs sans music on Monday’s “Tonight Show,” where Shelton told the NBC late-night host to kiss his “country ass.”

Oh, and “Voice” host Carson Daly was there pretty much just to clap along. Moral support, we guess.

Watch the video above.

Anyone feel a sudden urge to watch “The Brady Bunch” and play Rubik’s Cube?