Fallon debuted the bit with the help of "Brooklyn Nine-Nine" star Terry Crews. Together, the two shirtless men sang the Paul McCartney and Stevie Wonder hit "Ebony and Ivory" while flexing their pecs and rolling their abs. At one point, Crews showed off his biceps when he started pumping his arms to the music.
Surprised that Fallon had nearly the same athletic build of football-player-turned-actor Crews? Look a little closer, and you'll see the comedian wasn't exactly flaunting his own muscular physique. As the end of the clip revealed — and a few spots in the duet hinted — Fallon was using a green screen, his head superimposed on a super-buff and tatted body.
"The Tonight Show" airs weeknights at 11:35 on NBC.