![Mariah Carey Joins Jimmy Fallon,and More for Awesome Rendition of ‘All I Want for Christmas’ [VIDEO]](http://townsquare.media/site/65/files/2012/12/hqdefault2.jpg?w=980&q=75)
Mariah Carey Joins Jimmy Fallon,and More for Awesome Rendition of ‘All I Want for Christmas’ [VIDEO]
Pop diva Mariah Carey, 'Late Night' host Jimmy Fallon, The Roots (on musical instruments fit for children), and a handful of kids got together backstage before 'The Late Show with Jimmy Fallon' and performed one of the best versions of 'All I want for Christmas is You' I have ever heard.