This performance is pretty much the closing number from season 1 Episode 17 of the Muppet Show (1976). An what a number! Ben attempts to cheer up Droop by singing “Pure Imagination” from Willy Wonka and the Chocolate Factory. Of course, in the world of the Muppets, imagination is a very powerful thing.
Vereen really does a great job on this one. With his pipes and acting chops he could have been a mighty fine Willy Wonka (not that I am suggestion that Gene Wilder was anything but perfect).