Need help identifying musicians
 

I was bored and decided to watch my copy of We Don't Care About Music Anyway, and realized I had no idea who these artists are specific to the clips. I really dug the performances but can't identify any of them. I uploaded the clips I was referring to. Maybe some genius here can make me look silly

http://www.youtube.com/watch?v=WG9lR6aN53o
http://www.youtube.com/watch?v=MyGwX-ZDxoo
http://www.youtube.com/watch?v=kj3K6AIvfDs

No idea, but I'm sure someone here will know.