12/14/2011 12:49 pm ET | Updated Dec 15, 2011

Jimmy Fallon's 'SNL' Promos: Former Cast Member Returns To Host (VIDEO)

This Saturday, December 17, Jimmy Fallon returns to host "Saturday Night Live," where he cut his teeth as a cast member from 1998-2004.

This will be the first time to host "SNL" for Fallon, now comfortable in his "Late Night" perch in Studio 6B at Rockefeller Plaza. He'll be going upstairs to 8H to host the Christmas episode of the program this weekend, with musical guest Michael Buble.

In the promos for the program, Fallon and cast member Fred Armisen play guitar, improvise and forget the melody (but not the lyrics) to Jingle Bells.