When the ballerina star of a musical feature walks off in a huff, aided by the fit-throwing director, her understudy steps in and a star is born.

A group of tourists is given a tour of a movie studio lot. They see the various permanent sets that are used for different types of movies, and they appear to watch the filming of several productions in progress. Musical numbers from several previous Warner Bros. Technicolor shorts are edited into this short to create the illusion.