Kami Thompson
This is the daughter of Richard and Linda Thompson so there are some damn fine musical genes at play here.
And lets not forget her brother, Teddy Thompson, who is also an excellent musician. Of course he's not a chick, but he does play the guitar pretty damn well like his dad. Not a bad voice either. I like his album, Separate Ways, and his contributions to, I'm Your Man (Leonard Cohen tribute) are excellent as well. He came out with a new album recently called, Bella. Haven't heard it.
Great genes indeed!