Stairway to Gilligans Island - I don't know who did it and I have only heard it twice. "and she's buy-i-ing a stairway to Gilligans I-i-sland". All the words to the intro and outro themes of Gilligan's Island set perfectly to the tune of Stairway to heaven. The funniest part is when it kicks up to the big stupid,distorted, falsetto ending " With Gilligan, the skipper too.....". I know it is just a send up but I can't think of one I ever laughed harded at.