Even without any big surprises, “Saturday Night Live” capped off 2015 with a bang.

The NBC show welcomed back two of its biggest stars, Tina Fey and Amy Poehler, to host the last episode of the year this weekend, who joined musical guest Bruce Springsteen and the E Street Band for a rendition of “Santa Claus Is Comin’ to Town” at the end of the show.

As a special surprise, Springsteen and the “SNL” cast welcomed Paul McCartney to the stage to join in on the Christmas song. The former Beatles bassist strolled out onto the stage casually, carrying sleigh bells for some Christmas cheer and joining on the vocals.

The appearance, however, was teased a bit, only by Springsteen’s Twitter. He tweeted earlier on Saturday, “Got a few surprises in store for #SpringsteenSNL tonight… tune in! …and make sure to stay up for the end credits!”

After the appearance, “SNL” cast member Bobby Moynihan posted a selfie on his Twitter, with himself, other members of the cast and, of course, McCartney.

Ahead of the holiday-themed performance, Springsteen and the band performed “Meet Me in the City” and “The Ties That Bind.”

“SNL” will return to NBC on Jan. 16. Though no musical guests have been announced yet, “Star Wars: The Force Awakens” villain Adam Driver will host the first episode of the year.

Watch the clip below.