Well the first thing I'd like to say that this is amazing, it's really well done and it looks so intense and, well I guess real. You've done amazing work with having everything seem to blend and look natural on her, your skills are remarkable and that is the first thing I'm throwing out there. <3
Second, and actually the last thing since there's not much wrong with this, is that the only thing that sort of sticks out like a sore thumb are the smile scars. I know they are supposed to, but then again I would expect those scars to be more deep rather than popping out of the skin, you know? I think she would look nice with deep cuts rather than the cuts looking a bit like... hills I suppose?
Well, there's your critique. This is a lovely piece once again, and keep up the good work!