Legendary songbird Mariah Carey arrived glamorously late for the backstage performance of her yuletide classic, “All I Want For Christmas Is You.” The jovial Jimmy Fallon, his musically gifted house band The Roots and a group of kids joined helped her create a funky, off-beat rendition of the X-mas jam by using toy instruments. Let MiMi mesmerize you with her incredible voice below.

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