More female vocals

I'm surprised nobody mentioned Diane Shuur. Perhaps the greatest jazz vocalist I know (Ella on steroids). I 2nd Diane Washington and Shirley Horn. I have many CDs by Shirley Horn but this is the best one http://www.amazon.com/You-Wont-Forget-Shirley-Horn/dp/B0000047BK/ref=sr_1_2?ie=UTF8&s=music&qid=1270340064&sr=8-2

"billie holiday. can't believe nobody's mentioned her yet..."

- no need to mention her - she's by default