AllMovie

This is a fairly entertaining comedy by F.J. Gottlieb with a dash of music thrown in for good measure. Conny Froboess plays the niece of a man who used to be a singer and now owns and runs a record company. The niece loves to sing and one day decides to disguise herself and enter a singing contest to try to further her ambition -- and she wins. Meanwhile, her uncle is suspicious so he hires a detective to find out about what his niece is really doing, which happens to be impersonating her imaginary singer and being herself in contradictory and amusing situations. Soon the detective and the niece make contact and take a liking to each other, complicating matters considerably.