Most unusual/mesmerizing female voice.

Kat Edmonson, I would add a you tube link but you'd be better off checking her out on Austin City Limits this Saturday, an encore presentation with Norah Jones in the first half of the show.

Molly Drake

(Nick Drake's mother!)

very similar to Nick in tone and content but with piano

Been on a Casandra Wilson fix for a while lately...

Yma Sumac's voice is mesmerizing. Yma Sumac's name was based on her mother's name, which was derived from Ima Shumaq, Quechua for "how beautiful!" although in interviews she claimed it meant "beautiful flower"; either way she was beautiful.

Enjoy the music.

Beth Orton has a distinctive and arresting voice.

Suzanne Vega just makes me melt into caramel and syrup every time I hear her.