The Blue Straw Hat(1949)

Original title: Der blaue Strohhut

Pretty hat-saleswoman Lola wants nothing more than to become an operetta singer. Unfortunately, it isn't so easy to make it in the music business. Operetta diva Isabella, on the other hand, is sick and tired of performing and leaves the stage, despite the fact that her partner begs her to stay, because without her he can't premiere his latest work on the stage.