+1 on Alison Krauss; in my opinion, the sweetest voice on Earth
While not solo, Voces8 have the best human voice performances and recordings I know of, and their soprano, Andrea Haines, must be heard to be believed.
Enjoy.
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.