We’re in the final month of David Letterman’s late-night TV reign, and while Billy Crystal won’t be Letterman’s last guest (although he actually was Jay Leno’s first and last!), Crystal did kick things up a notch or two or more with a musical tribute to Letterman’s sunrise and sunset on the TV stage.

To the tune of Fiddler on the Roof’s “Sunrise Sunset,” roll the highlight reel and cue Billy!

You hadn’t seen some of those faces in a while, had you?

David Letterman, the longest-running host in late night history at 33 years, has 25 broadcasts remaining of the Late Show, with the final broadcast on Wednesday, May 20, 2015 (11:35 PM-12:37 AM, ET/PT) on CBS.

Celebrities who’ll be stopping by during the final five weeks include: George Clooney, Robert Downey, Jr., Will Ferrell, Tina Fey, Tom Hanks, Jack Hanna, Scarlett Johansson, Michael Keaton, Steve Martin, Bill Murray, Sarah Jessica Parker, Don Rickles, Julia Roberts, Ray Romano, Paul Rudd, Jerry Seinfeld, Martin Short, Howard Stern, John Travolta, Bruce Willis, Oprah Winfrey, The Avett Brothers and Brandi Carlile, Elvis Costello, Dave Matthews Band, Emmylou Harris, Norah Jones, Mumford and Sons, Ralph Stanley and Amos Lee, and many more names to be announced in the coming weeks.