Brie Larson (Link 2), a singer-songwriter, has been labeled by America Online (AOL) as a "certified Super Star in the Making and they have selected her to participate in their Breaker Artist Program." She may very well be one of the best actress-singers that I have heard sing in a long time...a long time.
I highly recommend her songs, too. Buy her single now or wait until her album comes out this summer. She was last seen on the big screen in Sleepover.