Not a singer, but someone amazing and worth listening to. This guy has pioneered a unique style on his own design of guitar that involves playing bass lines with his thumb and guitar lines with his fingers, all at the same time. Has to be seen to be believed it’s that amazing. This is a full live concert from February 2012.
WARNING: Jazz contained within ;)
http://www.youtube.com/watch?v=j8xPaAnx5OM
He’s a massive inspiration to me to not be afraid of what people say is or isn’t possible, to not be afraid to try something new and not be put off by others.