Curious though.
So I always heard the song as "She died, of course" but google and wikipedia seems to claime "she's dead, of course". Which versions do you know? And does the song just stop there are does in go through all the iterations a final time?
By the way, My thirteen answer are:
Either "she" or "the old lady" and either "dies" or "died" or "'s dead" and either the "of course" is included or not. (That's 12 if you like combinatorics). And "death".