It's either Marilyn (spelling?) Monroe or Cruella Deville.

those would be my guesses, anyway.
I'll be right back with some feedbacky goodness.
I love it. I love the lines, and the classic feel it embodies. I love the fact that you used pointillism for shading, it makes it very unique, because that’s not something you see a lot of outside of landscape designs. I love it though, it gives the piece a very classy feel. Artsy, posh, and very stylized. I like it a lot. I hope you share more of your work with us.
ETA: This piece also reminds me of something one might see from someone coming out of an art class at the University.