So, I have always been intrigued by songs which can switch lyrics without batting an eighthnote. That is, you can sing the lyrics from one song to the tune of the other. My favorite is the three-way of House of the Rising Sun, O Little Town of Bethlehem, and Theme to Gilligan's Island. Who discovers these???

Anyway, the other day I was informed that you can sing the words to Green Eggs and Ham to the tune of 99 Luftballoons.

Does anyone else know of other mix 'n match songs?