I still think it's her. We know she had make-up, and she's blonde, who's to say she didn't bleach it more? As far as the lines, yeah it was copied from something, but it could be a copy of a copy of an original. We don't know the quality of their work. I think Phillip made her pose for it.
A real model would be wearing something better than baggy denim for a top, and smiling more I think...
One more thing, he probably never let her get her hair cut, so it probably would be that long and ratty looking after all these years.