Mariah Carey gets into the holiday spirit early this year with a special rendition of her classic hit “All I Want for Christmas is You.”

Last night, Mimi appeared on “Late Night with Jimmy Fallon” during a special pre-taped segment. In it, she joins the Roots crew – ?uestlove plays a classroom toy instrument in a Christmas sweater – to perform an acoustic rendition of the track, complete with a small chorus of kids.

Mariah’s 1994 Xmas anthem has been rocking the charts for almost two decades. Last week, Billboard announced its first Holiday Songs chart of 2012, with that track leading the rest.

Watch the video below (via Miss Info).

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