Lennon recorded his lines at the same time as Jackson, who found the impersonations humorous. Jackson attended the recording session alone and did not use the special trailer set up for him. According to Jean, Jackson did record versions of the singing parts, but "Simpsons" music editor Chris Ledesma said they were not used. Kompowsky's normal speaking voice, heard at the end of the episode, was recorded by cast member Hank Azaria. The episode originally was supposed to end with Kompowsky singing a portion of Jackson's song "Man in the Mirror", but it was changed to "Happy Birthday Lisa".