Jimmy Fallon and One Direction's Christmas Sing-Along Will Bring You So Much Holiday Cheer

One Direction stopped by The Tonight Show Starring Jimmy Fallon in December 2014 wearing their finest festive gear and we can't help but rewatch it as we start to get into the holiday spirit again this year. The boys joined forces with Jimmy and his band, The Roots, to sing the most amazing rendition of "Santa Claus Is Coming to Town," using only classroom instruments and their sweet voices. Watch above, and then make sure to get a head start on your shopping with our 2015 gift guide!