She is the daughter of a friend of mine.  She has a twin brother.  I've done a bunch of silhouettes of her in different mediums.

Very cool, I love the picture you chose for your subject ... where'd you find it?

Thanks.  It was sooo fast and easy to make.  I have spent days painting silhouettes on canvas, waiting for them to dry and on and on. 

Nicely illustrated tutorial! I'll definitely have to try this. I love your choice of materials.