 In addition to their appearance in the film, Green Day recorded its own version of the Simpsons theme, and released it as a single. Zimmer turned the Spider-Pig song into a choral piece, which was a joke he never intended to be put into the film. Zimmer also had to write foreign-language lyrics for the 32 dubbed versions of the song when the film was released internationally. He found translating the song into Spanish the hardest to write. The same choir learned to sing the piece for each of the foreign-language dubs.
