What you should see if you click below is the musical finale to NBC's 60th Anniversary Special in 1986. Actually, I've embedded the entire special and if you want to watch it, you should be able to easily figure out to watch it…but I've placed a bookmark which should make the video below start at the point where you'll just see the last three or so minutes. (If the player starts at the beginning of the show, move the slider down to 2:23:25 to see the closing tune.)
Like all of these, the stars aren't singing; just mouthing the words to a prerecorded track by studio singers. Also, like all of these, it's frustrating how many people were there but the cameras never got a good shot of them. The most interesting thing you'll probably see here is that they have Johnny Carson, Steve Allen and Jack Paar together in the same studio. I wonder if this was the only time that ever happened.
I also wonder: There have been a number of these group numbers with a network gathering its past stars. Who do we think was rightfully in all three networks' group shots? Who do you see in this one who was also in the ABC one I featured here the other day?