Lisa Hannigan: I Don't Know

It's not the most original choice, as I saw this on Jools Holland's Later a few days ago, but I think I am in love. Mostly it's the plait.

Lisa Hannigan reminds me a little of Bjork, though I suspect you are less likely to be attacked with a dried cod if you say the wrong thing to her.
More about Lisa Hannigan on her own website.