One Direction Sing 'Santa Claus Is Coming To Town' Using Toy Instruments With Jimmy Fallon

But where's Zayn's solo, dammit?

One Direction upped their cute factor on Monday night when they stopped by "The Tonight Show Starring Jimmy Fallon" and slipped on their Christmas sweaters.

I know what you're saying. "1D in Christmas sweaters? I can't even." Well, you can.

Niall, Harry, Louis, Liam and Zayn each donned an Xmas jumper, picked up a toy instrument -- at Fallon's request -- and joined the late-night host and The Roots to sing their rendition of "Santa Claus Is Coming To Town." Mini-saxophones were tooted, yellow bananas were shaken, drums were pounded, solos were sung.

The only thing missing was a high-note from Zayn, and trust me, it didn't go unnoticed:

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"One Direction: The TV Special" airs tonight at 8 p.m. on NBC.