I love this film! I can't believe that people can love Danny Kaye in such mediocre films as "Hans Christian Anderson" or "The Court Jester" and not even have heard of this one. Kaye simply steals the show as both a nervous book-worm and as his popular night-club performer brother. "Cuddles" Sekall is equally great with his rib-splittingly hilarious delicatessan-owner ("I ask you vot you vant?") and Otto Kruger also has a role in the film. A part to look out for is the part where the ghost of the murdered night-club performing brother Buster gets inside the body of his brother for the first time, making the shy book-worm start dancing all over the place insanely. The only thing that I would say is wrong with this film (and with many other Samuel Goldwyn films for that matter) are the ghastly scenes featuring the Goldwyn Girls. But this film does contain a very funny sequence in which Kaye sings Orci-cogna (I don't know how you spell it) only getting continuous bouts of hay-fever. Oh, and I certainly couldn't write a review on this film and omit the great opera scene at the end where Kaye ends up having to have to sing clues about a murder to the police. This film a rightly deserved oscar for best special effects, and was nominated for a few others including best song. All in all, a highly underrated film that is well worth seeing. Enjoy! 10/10