Bill Haley and the Comets were last-minute additions to the cast. They were touring Germany at the time, and had made headlines the night before shooting when one of their Berlin shows turned into a riot. The next morning, as the band prepared for their shoot, Catarina Valente as a joke came on set wearing riot gear, asking directions to the Haley concert.
At the end of the film, Catarina Valente performs a rock n' roll duet with 'Haley, Bill'. In doing so she became one of the first - if not *the* first - woman to perform a rock and roll song in a movie. The name of the song was "Vive la Rock and Roll," a novelty tune based on Frère Jacques.
Bill Haley and the Comets originally performed three songs in the film, but footage of them performing "Whoa Mabel" was cut (the song can still be heard in the background). Photos exist showing the band filming the song, with sax player Rudy Pompilli dressed in drag. The footage and soundtrack recording seem to be missing.