Hair matters. Obsession with hair is pretty much worldwide. And a good reason for choosing a woman subject over a man: women are much more easy with changing hair styles and trying on wigs.
This is another sequence where Nicole managed to get back into the same position and expression even after going to the bathroom to totally change her hair style. The only thing I did in computer was to align the shots so her eyes are roughly in the same spot.
Bottom line: If you are photographing a woman, pay attention to her hair.
82mm, f13, large studio softbox to left, wall used as fill light on right