I've just read that Dolly Parton, in addition to the 3000-odd songs she wrote that we know about, also has a whole unreleased back catalogue of material she intended to be released posthumously to keep her estate funded, so her philanthropic work could continue after her death.
It's often said that James Brown was the hardest working man in the music industry. Well, I think Dolly must have been the hardest working woman.
Everyone reading this will be dead when Dolly stops releasing new music!