 The show became a huge success with many hit songs.From there UFA contracted with Gilbert to make films, beginning with "Die Drei von der Tankstelle", which inaugurated his long musical collaboration with Werner Richard Heymann with such hits as "Ein Freund, ein guter Freund", ("A Friend, a Good Friend"), and "Liebling, mein Herz läst dich grüssen" ("Darling, my heart sends you greetings").The partnership continued with "Der Kongress tanzt", and the hit "Das muss ein Stück vom Himmel sein" ("This must be a piece of Heaven") and the song that always remained associated with both of them, "Das gibt's nur einmal, das kommt nicht wieder" ("This happens only once, it doesn't come again").