In the flashbacks, young Achim on the keyboards is a nod to Achim Hagemann, Kerkeling's schoolmate and longtime stage companion.
The movie's score's main tune is based on Hape Kerkeling's 1991 hit "Das ganze Leben ist ein Quiz" (The whole life is a quiz), written by him, his back-then life partner Angelo Colagrossi, and his old friend Achim Hagemann. The song itself is based on the 1988 song "Sì la vita è tutta un quiz" by Renzo Arbore.