A surprising number of them are under copyright. I thought
about it this morning because the BBC had a story that
hinged on Kookaburra
being under copyright.
Of course, everybody knows about Happy Birthday,
largely because of the suit
against the Girl Scouts. This is why a family-friendly
restaurant I go to sometimes has its staff come out with the
lighted cake singing “Happy Birthday” to the tune of the
Hallelujah Chorus, instead of the tune the rest of
us use.
An example I noticed reading through a fakebook, that I don’t
know anyone’s been sued over is On Top of
Spaghetti. (No, my mother didn’t teach me that one —
I learned it in the gutter.)