ballerina clinic and a question for bonnie . . .

In this practice sketch I wanted to leave the face of the ballerina undone.  With just the hint of a face is it possible that she still looks like someone you may have seen before (or am I just being lazy)?  I really enjoyed 'penciling' the skin tone - and - drawing just that little bit of the chair leg was just like having a little piece of chocolate.

QUESTION:  Bonnie how did you execute that last drawing?  As you can see, I really want to know!