This is the closest we'll ever get to seeing the wonderful Marilyn Miller on stage in her role as Sunny. The title song and the memorable "Who" were some of the most popular tunes in the late '20s, as played by George Olsen and His Music (who not only played in the Broadway production but cut a record with those songs on it.) It's rather interesting that WB made this movie right at the end of the musical era: had the stock market crash happened two years later, this might well have been an color production. It was certainly intended to be a blockbuster, and if only for that reason it's worth watching -- to see what constituted "popular" in a different era.