Watch Jimmy Fallon and One Direction Sing “Santa Claus Is Coming to Town”
‘Tonight Show’ host Jimmy Fallon loves a good recurring sketch or game, but one of his very best repeating gags is one we don’t get to see often enough. When given the right musical guest—typically, someone funny and plucky and more than willing to go a bit crazy—Fallon and his house band The Roots will break out the classroom instruments and everyone will just go to town on a particular jam.