I don't remember where I first came across this, it wasn't YouTube. A newsfeed, maybe. Not what I'd be looking for usually, but I liked it, and enjoyed their charisma and the chemistry between them - although I couldn't get the song out of my head for days afterwards...
I wish the audio recording was better on this, but whirimako is such an amazing singer and so interesting to watch that I had to post this, anyway. It's a 20 minute mini-concert. Be sure and check out the blues at around the 12 minute mark!