[Lewis.]

Kelly Clarkson pretty much does it for me. She has an amazing voice and can sing anything. It doesn't even look like she's putting any effort into it, but in a good way, if you know what I mean? She doesn't ned to put effort into her singing because she can just do it anyway, she is amazing and i'm sure a lot of you will agree. I can say aswell that she is one of few artists that sound better singing live

Other mentions are -
Leona
Christina
Sara Barielles
Damien Rice