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.

The pop-up children and grade school style instruments being played by grown men gives this video a humorous edge, but in all honesty it's a brilliant performance - but I suppose there really is no such thing as a bad performance when Mariah Carey is involved, am I right?