Really astonishing!
Wow, i supposed that you used many layers for this, but i wouldn't have imagined that they're far over 100!
Some say digital artists aren't able to draw "real paintings" the classic way, but when reading your comment about all these different brushes used exclusively for a certain effect, i'm pretty sure you are great in drawing with real brushes as well.
Although i guess it is still harder since you don't have ten dozen layers you can smooth out seperately.
But i think that's the great thing about digital art, it allows more details and you can't ruin your entire drawing by one mistake.
As aforementioned by SardonicSamurai, her lips look really good.
The light effects look also very realistic, especially the green hoes are asonishing. I guess there are not any tricks you could tell us about this, aside from having a good eye that knows which areas are affected by the light?