Blond girl :: Pixel Art Detail

Other than the hair, it looks just like a cartoon character!

Adarias, thanks a lot, your information is very helpful to me since I try to learn pixel art. As you've seen I was inspired from Kenneth Fejer works, but I cannot still understand some
of his technics, especially about hairs. The picture were kinda *antialised* on a black
background that's why the outline looks like this, but yes it can be done a lot better. I'm
going to take a look at the link you gave to understand it more in details.

i think that, while decent, this could really do with a study of form and some practice anti-aliasing.  Since id put money on this being inspired by Kennth Fejer, id suggest you take a look at his pieces like the one he recently posted http://www.pixeljoint.com/pixelart/8327.htm and also to look at traditional portraiture, o get a better sense of how the face looks.  All-in-all a nice job, but i see a lot more potential in it than i tihnk this piece has fully realised (and thats a good thing).  If you dont intend for it to be used on a light background (as the aa work implies) then you may simply want to post it without transparency

Some things look a bit off like the hair looks flat and the arms is very thin, but it's quite nice.