Hey, you left out my suggestion of Cindy Lauper.
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Blondie
Cher
Celine Dion
Grace Slick
Patty Smyth
Belinda Carlisle
Cindy Lauper
...and in the total druggie/train-wreck category we have:
Courtney Love
Whitney Houston
Liza Minelli (ROTFLOL!!!)
Ozzy
Keep 'em coming....