The R&B living legend Mariah Carey has some fun for the holiday season, away from all the stress and controversy of filming American Idol. Just in time for the holidays, Mariah warms out the Jimmy Fallon set performing her version of the song “All I Want For Christmas” accompanied by The Roots on insturmentals and ofcourse Jimmy Fallon playing some unknown hilariois instrument that most likely has no musical effect, but we appreciate him playing it anyway becasue he’s well… Jimmy Fallon.. Check out the dynamic group’s sit down performance of “All I Want For Christmas” accompanied by a choral group of singing children… and get in the spirit of the holidays…Tis the season!