It's looking very nice to me. In the reference pics the upper lip looks a little larger, but I don't think it actually is. Just the way the camera is seeing it or something. Look at her eyes now. On the edges of the eyelid, they need to be extruded just a tad where the eyelashes go. It's one of those details people won't notice unless it isn't there. She also has just a very slight indentation on each side of the chin that makes her chin rather well defined. There are also two rather well defined bumps on her forehead. You could probably do that with the bump map though. There also seem to be some slight indentations from the jaw just in front of her ears. I know, niggling details that really depend on just how real you want to make the model. The ears are a little close to the head. Her ears stick out a bit more.

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