Can't believe there wasn't a thread on her, so I'm starting one up. She has an absolutely incredible voice and has so many cover songs that she's wonderfully made her own, you might not even realize that they weren't her songs. Some of my favorite songs by her include It's All Over Now Baby Blue, The Night They Drove Old Dixie, Silver Dagger, Let It Be, Sweeter for Me, and Diamonds and Rust.

Joan with Bob Dylan (wikipedia)

(altmanphoto.com)

(sing365.com)