I definitely though Merilly we Roll Along was going to be about a boat.
And I'm pretty sure my exact comment (before seeing it) was "Bye, Bye Birdie, why do I wanna see a show about birds going away?"
I also kinda expected Grease to be about something greasy.
And I also thought that "My Fair Lady" was about the lady who was being told that London Bridge was falling down.
http://www.youtube.com/huskcharmer