She destroyed herself with years of drug and substance abuse. She even managed to "out drug" Bobbie Brown, and that's saying something. Sorry, but I can't say the news of her death was a shock. Saddly, it was pretty much bound to happen sooner or later. Reports from her last live tour say her voice as so damaged that people walked out and asked for their money back.
I've always said, "If you can't set a good example, then at least be a horrible warning to others."