Favorite Female vocals that give you goose bumps

When she is on, I'd toss Belinda Carlisle in there also.

Thanks for the recommendation on Melody Gardot. Pleasantly surprised! You guys and gals should pick it up.

My first post: A second for the hugely overlooked Maria McKee.

Her cover of Van Morrison's "The Way Young Lovers Do" is a goose-bumper. Also, three in a row on Lucinda Williams' Essence, "Steal Your Love," "Envy the Wind," and "Blue." and Nina Simone's "Sinnerman" up there, too ..

So many good suggestions. For classical the new singers are wonderful, but still nowhere near Callas, Joan Sutherland and most wonderful of all Vittoria De Los Angeles. Her duets with Jossi Bjorling, just heaven
As for popular, I will try not to repeat the excellent suggestions, I would add Katrine Madsen the Scandinavian Jazz singer, Rosie Thomas, Eliza Gilkyson, Liz Wright, Cassandra Wilson

Hmmm.... Bond. Yes, I just added their albums to my Rhapsody subscription. Now I have them all and am listening as I type this. Might sound hokey, but this would be excellent music for when I do intervals on the treadmill.

Here's some different female vocalists I enjoy; they are quite diverse in sound, from the "little girl" shrillish sound to the deep, sounds like she's smoked all her life sound:

Carly Simon "Have You Seen Me Lately"
Swing Out Sister (Corinne Drewery) - Anything she sings!
Anything But the Girl (Tracy Thorn) "Amplified Heart"
Sixpence None the Richer (Leigh Nash) "Best of..."
Christina Aguilera's "Song for You" on Herbie Hancock's Possibilities disc
Kate Bush "The Whole Story"
Beth Nielsen Chapman "Beth Nielsen Chapman"

Absolutely right regarding "Diamonds and Rust"; I've heard very few pieces as stunning for demo/assessing set up of system and, of course, for pure enjoyment of female voice.