I adore Amy Winehouse. I can't approve of her personal choices (i.e: the dramatic weight loss, drug habits, etc...) but the girl can sing. With the recent release of her album "Back to Black" has received many great reviews, and a few hits already. If you don't already have it, I recommend anyone to go out and buy or download the album filled with jazzy folkish songs with a strong voice and lyrics behind them. Here are two songs of of them that are constantly getting stuck in my head.
Back To Black
Rehab