Eyebrows over the hat, and rectangular shaped
COMMENT BY JANINA:
I know this is the way South Park handles it, but I like it better how it is now. It makes more sense to keep the eye-brows under hair and hat, because this is how it is in reality. And there are many different shapes of eyebrows in the SP-Studio. I believe some of them would look really weird if they were on top of the hats.
So... though I understand why this was suggested I will not include it.