Best female vocal recording on CD?


i am a sucker for great warm rich smooth female vocalists, especially on tube gear and speakers that image well. but i am almost always faced with a great voice/song but a sonically inferior recording (examples too numerous to list) or a great recording of a mediocre voice.  rickie lee jones (pop pop) comes to mind- fab recording, but come on lets be honest about her voice. however, i will almost always pick great recordings and leave the bad recordings for the car.

 so i am asking for what you use as a reference female vocal recording/track. right now i come back tp bonnie raitt "you cant make me love you" from luck of the draw.  big, warm, strong voice. not a perfect recording. but hmmmm that voice.

my only requirement is it has to be on CD. and we all know of great vinyl that did not translate into great CDs.  so help me out here, what should be my next music purchase 
meiatflask
Jennifer Warnes: Famous Blue Raincoat (songs of Leonard Cohen) and
The Well. Very well recorded.
I believe she was labeled "boring" earlier in this thread but.............
Norah Jones recordings are excellent from an audiophile standpoint and I could literally listen to her sing a phone book and smile.  
Hannah Reed of London Grammar- ("If you wait" is my favorite)
Shelby Lynne
Loreena Mckennitt

All the above have gorgeous, involving and emotional voices. Worth a listen if you aren't familiar
Check out Margo Timmons of the Cowboy Junkies and Kelly Flint of Dave's True Story.  Amazing voices!  Rene Marie is also very good, and let's not forget Jennifer Warnes!
Calvin - yes Cecile Mclorin Salvant Womanchild Fantastic!
Tooblue - you are right, Patricia Barber, Diana Krall and Nora Jones are also Fantastic. Boring? Really? To who?
Eva Cassidy - breathtakingly beautiful as some pointed out
Anything by Joni Mitchell "Blue" is out of this world
Aretha Franklin - Has there ever been a woman with a more soulful voice?
Lisa Gerrard - Tremendous
I am going to add Alison Krauss. Has anybody heard " Ghost in this house".
https://m.youtube.com/watch?v=dWRGZaHb8xE