In a delightful and elaborate musical number from "The Singing Kid" (1936), the zany singing quartet The Yacht Club Boys descend upon Al Jolson ("Al Jackson" in the movie) and berate him for singing the tired old "Mammy Songs" that Jolson was famous for. The argument proceeds out on to the street to involve dozens of extras. Luther (Lutar) Hoobyar is the operatic vendor. Video looks frozen at the beginning but it's not. For a great little cartoon with the same main song, see the video here:
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