Yes, they're really playing music on Nintendo's Labo.
Specifically Jimmy Fallon and The Roots, who joined Ariana Grande to play her newest single "No Tears Left To Cry" on The Tonight Show Monday night.
Fallon told IGN he and the band worked with Nintendo to create guitars and other instruments out of cardboard.
"It was totally bizarre and such a gamble," he said. "I didn’t know if it was going to sound good, but Ariana is always down to try something fun and different. Anyone can do what we did really, it just takes time. Whatever you dream of, you can make it." Read more...More about Music, Gaming, Nintendo, Jimmy Fallon, and Ariana Grande