I have this vague memory of this movie I once saw.

I think it starts with people visiting a ´pirate ship´ in the harbor (modern time) but its like a Disney show with "pirates" acting out a show or such thing.

And then from there on it goes over in a "real" pirate movie, someone fell and hit their head? And I remember a very catch song which was used during a combat scene, almost musical style.
It's not much but I'm hoping people remember the beginning of the movie and know which it is.

That said, now I'm gonna watch the "classic" Cutthroat Island (1995). ^^