Favorite Female vocals that give you goose bumps

Jennifer warren, Diana Krall

Grace Potter, Alison Krauss, Maria Muldaur, Amy Lee,(lead singer Evanescence)and Bonnie Raitt, as well as most others mentioned.

Jane Relf - the lead singer for the original incarnation of the group Renaissance, and later the group Illusion (and sister of Kieth Relf). I've mentioned her her before though and get the impression I'm the only one who is so impressed by her.

Of those previously named - here are some I really, really like:
Eva Cassidy, Julie London,Amy Lee, Lisa Gerrard, Margo Timmins

If there is one song and performance that comes to mind that gives me goosebumps almost every time I hear it, it would have to be Kate Smith singing "God Bless America"

Tubegroover,thanks so much for that heartfelt sentiment(and for a very big bellylaugh).