Modern Day One (Wo)Man Band

Well, then last post was off topic and so is this one, but it is worth it.

A long while back my girlfriend mentioned having seen a performance of KT Tunstall's where she gradually builds up the accompaniment to her own song as she sings it. It's all done with some fancy footwork and is very interesting to watch.

The song is 'Black Horse and the Cherry Tree' and here is the link (youtube).