12/03/2011 02:55 pm ET

Jimmy Fallon & Maya Rudolph Sing Christmas Duet On 'Late Night' (VIDEO)

Holiday humor has started to hit the late night TV shows, and that means one thing: Christmas song parodies. We're sure this weekend's "Saturday Night Live" will feature one (although there'll never truly be another "D*ck In A Box," will there?).

On Friday night's "Late Night," Jimmy Fallon and fellow "SNL" alum Maya Rudolph got into the spirit by putting a funny twist on a classic holiday song, "Baby It's Cold Outside." There was just one problem: Fallon thought they were going to sing something different -- something very different.

Watch the clip above (or here) to see what we're talking about.