The failure of the original copyright holder to renew the film's copyright resulted in it falling into public domain, meaning that virtually anyone could duplicate and sell a VHS/DVD copy of the film. Therefore, many of the versions of this film available on the market are either severely (and usually badly) edited and/or of extremely poor quality, having been duped from second- or third-generation (or more) copies of the film.
The design for the number "One-Two-Three" is based on the paintings of Jean Honoté Fragonard (1732-1806).
There are no "book songs" in this film, i.e. musical numbers tied to the plot. All of the musical interludes appear on stage, in the play within the play.
The original novel on which this is loosely based was "Und war kusst mich?" by Friedrich Dammann (1901-62), who is co-credited here only for a "film-story idea" under his real name F(riedrich) Dammann. He is best known for the twice-filmed cult classic "Madchen In Uniform".