Very nice, but....
There are some avoidable imperfections like for example, the nose ring looks like a cheap keychain ring picked off the floor, and it doesnt match the necklace which shows style and mild sophistication, and the nostrils are disturbingly small, also the mouth is tilted at a very awkward angle to the chin, if she'd tried to make it like that it'd wrinkle the face and would even take a different position.
on the good side i lOVE the shading and the style, the hair is brilliant, the neck...armpit's abit wierd and flat, but you did a rly nice and sharp job with the collar bone =D
/critisism
now that my artistic brain is set aside...MAKE BIGGER BOOBS!!