The 50th anniversary special for "Saturday Night Live" began with music generations colliding, with Paul Simon and Sabrina Carpenter singing ... before comedy legend Steve Martin took the stage to give a host's traditional monologue.

Steve Martin, Bill Murray, Paul McCartney, Eddie Murphy and Alec Baldwin were just some of the stars at "SNL50: The Anniversary Celebration" which aired live from New York, of course.

The Anniversary Celebration,' which featured iconic sketches, musical performances and appearances from former cast members.

SNL kicks off star-studded 50th anniversary with Paul Simon, Sabrina Carpenter and host Steve Martin - Sunday’s broadcast tops off a weekend of celebrity-filled anniversary programming

Bill Murray showed up on 'Weekend Update' to mock the anchors, Tom Hanks introduced an "In Memoriam" segment devoted to "characters and sketches that have aged horribly" and other highlights.

It’s hard to believe that Saturday Night Live is almost old enough to qualify for AARP benefits. Yet the groundbreaking sketch comedy series is indeed celebrating five decades on the air, commemorated with a 50th Anniversary Special on Sunday night.

The Grammy winners performed a touching duet of Simon & Garfunkel’s “Homeward Bound,” which he sang on the show decades earlier in 1976.