I loved the idea so i made you an edit.
The likeness is probably more accurate considering the fact that I pixeled this with her face plastered next to it. Good luck!

Edit: Also want to add that although color restrictions might lead one to believe that dithering is necessary ...it is often not so. The above was dithered in particular places for fun more than requirement, so keep that in mind. Try to really use your colors as they are first and if you need to touch something up, or perhaps add texture, you can try a dithered approach.
/2cents