Wizard of Oz, The Easter Egg - Buddy Ebsen Singing

After Dorothy and her crew meet the Lion, they all start off together down the Yellow Brick Road singing "We're Off to See the Wizard." If you listen carefully, you will realize that the Tin Man's part of the song is being sung by Buddy Ebsen, the original actor cast as the Tin Man, who was replaced after an allergic reaction to his makeup.