'Saturday Night Live': Jimmy Fallon and Michael Buble duet while Andy Samberg hits sour note

The multi-hyphenate (comic, talk show host, singer) Jimmy Fallon is set to host "Saturday Night Live" on Dec. 17. And if the promo is any indication, a song or two awaits fans of the show.

In the piece, Fallon decides to show off his musical chops alongside musical guest Michael Buble. The two were joined by cast member Andy Samberg for their Christmas-themed barbershop trio. Guess who can't carry a tune?

So Zappers, will you be watching? And which of Fallon's characters would you like to see him reprise?

Here's the video...