Credit: Twitter: Mariah Carey Photo: Mariah Carey Gets Glam For the Holidays

Anytime you add little kids and classroom instruments to the mix, things get exponentially more adorable. Watch the always glamorous Mariah Carey get down with Jimmy Fallon and The Roots in this singalong-worthy rendition of "All I Want For Christmas Is You." Trust us, you'll have it on repeat! 

 

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Credit: NBC, Late Night With Jimmy Fallon Photo: Mariah Carey Sings "All I Want For Christmas Is You" With Jimmy Fallon, The Roots, and Classroom Instruments (VIDEO)

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