Billy Crystal, Carol Burnett, Oprah + More Sing Goodbye to Jay Leno - VIDEO

Jay Leno had his final episode of The Tonight Show last night (Feb. 6) and to send him off in a big way, guest Billy Crystal organized a celebrity-filled musical number.

Watch in amusement and horror as Billy Crystal and company sing a parody of The Sound of Music classic "So Long, Farewell" complete with dancing girls and boys in lederhosen.

Jump to around the 2:11 mark to see the song, which features special appearances by the likes of Jack Black, Kim Kardashian, Chris Paul, Sheryl Crow, Jim Parsons, Carol Burnett and Oprah Winfrey.

Like or loathe Jay Leno, it'll bring a smile to your face.

WATCH: Jay Leno's Tearful Goodbye to 'The Tonight Show'