Sure, it's probably your girlfriend's favorite song, but dammit if this version of "All I Want for Christmas Is You" didn't just make my heart grow three sizes too big. Jimmy Fallon, The Roots, four random kids, and Mariah Carey—who is destined to get requests to sing this for at least another 40 years—performed the song backstage at "Late Night" on Tuesday by using just instruments found in a classroom. ?estlove kills it while playing a comb (I think?), and yes, that's a Fisher Price xylophone on the right.
[H/T: Late Night with Jimmy Fallon]