Mariah Carey is responsible for one of the most beloved original Christmas songs of all time.  'All I Want for Christmas is You' has been covered by many artists since its release in 1994, and now Jimmy Fallon is giving it his spin.  But Mariah's not about to let the late night host have holiday fun alone.

Boy, this girl can still saaaannnngggg!

'All I Want for Christmas is You' can be found on the Mariah Carey Christmas albums Merry Christmas and Merry Christmas II U.