Korbe Canida is a rising local musician in Phoenix with a helluva voice.
Other YouTube videos are here. She was recently profiled in the local New Times paper. ("...when she starts to sing, her powerhouse vocals captivate. Her sweet gaze, which she holds with each intent listener, keeps audience members transfixed and brings some to tears.") A recent Kickstarter for her first EP successfully funded; the EP should be out in the next month or two.
The "nerd glasses" isn't an affectation; she plays D&D. (Hey, this is ostensibly a science fiction blog; I gotta make a connection somewhere.)