Looking for good recordings of female vocals I have not yet tried...

Most of my listeing is female vocals and classic Jazz.  I have enjoyed current and older female singers.  I have most of Billie Holiday through current Diana Krall and Julia Fordham.  I enjoy good voices mainly acoustic.  It would be helpful if it is music I can sample online.  If the backing is mainly loud elctronic I would likely pass.  Thanks for your thoughts and experience. 


I just discovered this amazing artist from Nashville:


If you are a Loreena McKennitt fan like I am, this is essential!

Wailin' Jennys. A Canadian folk trio with magical harmony. The release, "40 Days" has had more playback on my system than any other.

Another one of my favorite performances is Nancy Wilson singing First Time Love accompanied by Ramsey Lewis on the piano.