Just noticed a goof
I don't know how many times I've watched this movie, but I just noticed this and submitted it to the goof page:
"Right before Shipoopi, Mrs. Shinn says her girls are ready to perform, but Ethel dances with Marcellus in the number and is dressed in a flowered dress. Immediately after the number, she is dressed in her Grecian urn outfit, ready to perform."
Either Ethel is a quick-change artist, or someone didn't think this one through. lol