Via #elixus @IRCNET, from Urban Legends References:
The next time you hear "Happy Birthday" in a movie — and now that you’re listening, it won’t be long — stay for the credits at the end of the movie. Think about how Hollywood would love the story of the Hill sisters, two Southern kindergarten teachers who write a song that they only hope will be a useful teacher’s aid.
I probably will refuse to use it anymore.
http://apple.sysbio.info/~mjhsieh/blog/mt-tb.cgi/357