Backstage before the show, Jimmy, Mariah Carey, and The Roots grabbed some instruments you'd find in an elementary school classroom and stopped by the Late Night "Music Room" to sing Mariah's holiday classic, "All I Want For Christmas Is You." (instrument list below)

Jimmy Fallon - wood block, tambourine, bass drum, kazoo
Mariah Carey - vocals
Questlove - wooden clacker w/ afro pick
Mark Kelley - Fisher Price xylophone
Kamal Gray - recorder
James Poyser - melodica
Captain Kirk - ukulele
Tuba Gooding Jr. - kazoo
Frank Knuckles - bongos
Black Thought - sleigh bells

Download Mariah's "Merry Christmas II You" here: http://smarturl.it/MCIIYou

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Jimmy Fallon, Mariah Carey & The Roots: "All I Want For Christmas Is You" (w/ Classroom Instruments)
http://www.youtube.com/fallontonight