VOCALOID - Miku Hatsune Nice Miku!
Her right ponytail just seems a bit to small, though. Considering the proportion, I can't seem to rationalize her right ponytail becoming that small, considering it is the same size as her other one. That's my only real issue.
I love your use of a white outline as opposed to a black one, that's something that you did that was a very smart move. It gives her a much starker profile only using one small move. It really seperates Miku from the background. Well done!