Watch: #OneDirection Plays Instruments And Sing Christmas Song With #JimmyFallon

#HarryStyles, #NiallHoran, #ZaynMalik, #LiamPayne and #LouisTomlinson wore novelty Christmas sweaters and played classroom instruments while singing "Santa Claus is Coming to Town” with Jimmy Fallon and #TheRoots on Monday’s episode of #TheTonightShow. Watch the clip below.