to add:
Lightening Hopkins - Blues baby. His accaplia (sp) "John the Revelator" is simply amazing
J L Hooker
Bruce Springsteen
Sarah Vaughn
Jane Monheit - New jazz artist. Fantastic voice
Diana Krall - Not only hot but has an amazing smoke-filled bar voice.
Nina Simone
Nancy Wilson
Alison Krauss
to name a few more