With her holiday hit blaring out of every speaker from Rockefeller Center all the way down 5th Avenue, everyone knows the words to Mariah Carey’s “All I Want for Christmas Is You.” To switch things up the American Idol judge had a jam session before her appearance on Late Night with Jimmy Fallon with the host and The Roots to belt out the tune on classroom instruments plus a ukulele and a xylophone. A quartet of kids popped up to sing back up, adding an cute twist on the Christmas classic. Take a look at the video below and see if you don’t get into the spirit of the season!