VIDEO: Paul McCartney Makes Appearance in Jimmy Fallon's SNL Opening Monologue

On last night's SATURDAY NIGHT LIVE, returning host Jimmy Fallon sings some holidays tunes with his musical idols - plus, Paul McCartney makes an appearance! Check it out below!

Fallon served as last night's host, with Justin Timberlake as the featured musical guest.

The program has won 40 Emmy Awards and now holds the title for the most nominated television show in Emmy history with 156 nominations. "SNL" has been honored twice, in 1990 and 2009, with the prestigious George Foster Peabody Award and cited as "truly a national institution." "Saturday Night Live" was inducted into the Broadcasting Hall of Fame by the National Association of Broadcasters, and the show continues to garner the highest ratings of any late-night television program, entertaining millions each week.