CUTE: Mariah, The Roots & Jimmy Fallon Perform "All I Want For Christmas" In A Kiddie Classroom...With Kid Instruments

Jimmy, his house band The Roots and Mariah Carey (in all red) all came together yesterday for a cute musical short involving school kids' instruments.  Check out the crew making music with xylophones, recorders, chalk board dusters and more while MiMi does a fab performance of "All I Want For Christmas."  With back up from some kiddies of course. Only Jimmy. Loves it!