You'll LOVE this. Mary Tyler Moore, in her short-lived variety show, in a song and dance bit with Dick Shawn, Swoosie Kurtz, David Letterman and Michael Keaton. It's amazing.
Sophomore year in college, I used to go back to the apartment for lunch after my early classes. The fare was usually a box of KFC or bag of Taco Bell or whatever, followed by a bowl of whatever cheeba we had on hand at the time.
Meanwhile, I'd be watching Letterman's daytime show. Did you ever see it? That was back when daytime soaps ruled, and I think Letterman, et al, sensed (correctly) they had no audience anyway, so they just winged it. He had Paul Schaefer on there, it was very free form.
Reminded me a little of the
Gong Show, which followed it and which I of course watched, also.