I’m not sure exactly when it happened, but Jimmy Fallon has become the funniest late night host working today–and yes, that includes Conan and Dave.   You can tell he’s starting to establish himself by the fact that no one in late night is getting better guests these days.

Last night was a perfect example.  He was joined by his house band, the Roots and Mariah Carey for a very special edition of “All I Want For Christmas Is You”

Enjoy!