I've been listening to this chick constantly this week.
Jazz/blues singer. First heard about her on NPR. She was hit by a car while riding her bicycle, and the accident left her with chronic pain and hypersensitivity to light and sound. Due to the accident, she wears dark glasses and walks with a cane -- but the look totally works for her.
I think I'm in love with her. Here's a video:
If you're interested, you can download her album Worrisome Heart on iTunes for $5.99.