"I Am the Very Model of a Modern Major-General (The Major-General's Song)" - Gilbert and Sullivan
I have some Gilbert and Sullivan in my collection. Once, some years ago, I allowed a friend to raid my collection and copy what he wanted. He grabbed the Gilbert and Sullivan in the process, and a few days later he complained to me, "I think you have these files mislabeled. This doesn't have Alone Again Naturally or Get Down or any of that, it sounds like opera or something."
I promise this actually happened, and I am not making it up.