Here's what you missed:
JT & Jimmy can wrap
That's not a typo – although they proved they could rap, too, in the show's cold open, in which they "wrapped it up" in costume as a roll of wrapping paper and a gift bag. Best present ever, right?
Jimmy & Paul McCartney also did a duet … and sounded great
No offense JT, but their take on "Have Yourself a Merry Little Christmas" won the night.
And yet another epic duet
Fallon also teamed up with cast member Cecily Strong for a cold-hearted spin on "Baby, It's Cold Outside," in which the song re-imagines the true ending of the holiday classic. You really can't stay.
On this edition of The Barry Gibb Talk Show …
Yes, that is really Madonna.
And then things got a little bit freaky
Home for the holidays? In this tongue-in-cheek sketch, Fallon reminded us what happens when the only thing getting between you and your significant other is your childhood bed. And that picture of you from seventh grade.