I remember one of the guitar magazines doing a piece on her a couple of years ago. They mentioned that she was a "looper girl" but I didn't know anything about loopers then.
I later saw a nice performance on the Tonight Show that she did. After that I forgot all about her.
I'm so glad that you posted her here. This is a great example of just one of the many ways that you can use loopers. In fact it is this style that made me decide to get one. I saw a performer locally using one except that his mic input on the looper went to a snare drum not his vocal mic.
The ways that you can use loopers is only limited by your imagination. Just think what you can do with delay, A/B switches, extra mics, electric guitar and effect pedals, or other sampled sounds.
K.T. proves that you can be artistic AND make money without a band. Just a little box, guitar, some toys and imagination. Cool!