Brody Dalle always had my attention for the last few years. Shame she married the big ginger dude from Queens of the Stone Age though. Melissa Auf De Mar (ex Smashing Pumpkins bassist) rates highly in my book too.
She's a lot smaller in real life than I've been lead to believe on their publicity photos. very tasty though , and a good set of lungs too.. ears still ringing mind...
Melissa Auf De Maur - she's knocking on a bit now then so am I. http://www.youtube.com/watch?v=SOhCGJ9IKRk