Car 54, Where Are You?

A Star is Born in the Bronx (2x11)

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While dieting to slim down for a part in a play, Sylvia blindly binges on cookies at the grocery not realizing she's being filmed. When the owner of the cookie company sees the film, he is so impressed with her appetite for his cookies that he wants to use her for his ""Dixie Dimple"" cookie commercials.