One Direction dropped by The Tonight Show Starring Jimmy Fallon last night to sing "Santa Claus Is Coming To Town," with the help of Jimmy, The Roots, and a glut of cacophonous classroom instruments. Look at their cute lil' holiday sweaters! Look at how much Niall loves his banana shaker! LOOK AT QUESTLOVE WITH THE HAND CLACKERS.

Here is the full instrument list, per YouTube:

Jimmy Fallon - wood block, Casio keyboard

Harry - kazoo, bass drum

Niall - banana shaker

Louis - tambourine

Liam - coconuts

Zayn - triangle

Questlove - hand clackers

Mark Kelley - Fisher Price drum, kazoo

Kamal Gray - xylophone

James Poyser - melodica

Captain Kirk - ukulele

Tuba Gooding Jr. - toy saxophone

Frank Knuckles - bongos

Black Thought - sleigh bells