I'm kinda sorta watching The Oscars and I just saw the big "Salute To Musicals" segment. Not a bad effort, but I prefer this piece, brought to you from the clever jesters over at http://www.improveverywhere.com.
From Funny Stuff #22 (June 1947), pencilled by the prolific Otto Feuer and perhaps written by Gardner Fox (about 14 years before "Flash Of Two Worlds").