Jimmy Fallon, Mariah Carey & The Roots: “All I Want For Christmas Is You” (w/ Classroom

Jimmy Fallon, Mariah Carey & The Roots: “All I Want For Christmas Is You” (w/ Classroom 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 Brown behind the scenes as he lays down a verse to Racked up Shawty.