Meet Miss Mozart (1936)

This French musical comedy was based on the stage play Mademoiselle Mozart, written by Yvan Noe, who also co-directed the screen version. Danielle Darrieux plays Denise, the owner of a music shop that is facing closure. Wealthy young Maxime (Pierre Mingand) falls in love with Denise but knows full well that she despises rich folks and would refuse to accept his charity. Thus, Maxime arranges to secretly buy the store then takes a job with the establishment as a humble sheet-music salesman. When Denise finds out that her new employee is actually her boss, she is furious, but rest assured that Love Will Find a Way. The lovely Danielle Darrieux is permitted to sing on several occasions, which she does enthusiastically if not altogether expertly.