Years ago I was setting out chairs during a pre-show rehearsal and since it was before everyone was due (rehearsal was scheduled to start in about five to ten minutes), folks were just playing around and the band leader sat down in front of the piano and asked, "Does everyone know Amazing Grace?" and when everyone said they did he started playing the theme song for Gilligan's Island and singing Amazing Grace. Of course everyone broke up laughing.
What is it called when this is done (singing a song to a different melody?)
Do you know where I can find a recording to show my friends that it works?