This is Drunk On Your Breath, by Catherine Traicos. She supported the Mountain Goats on their recent Australian tour - chosen, in fact, by John Darnielle himself after he saw this video. I hope you'll agree with me that she's woefully underappreciated.
If you didn't like that, maybe you'll like this! It's Catherine Traicos singing a duet with a saxophone - wonderfully discordant and interesting.