It´s hard to tell, so i will let you decide in which countdown she will be :)

I thought she was a redhead.

I'm pretty sure she's a redhead.

Deffinetly

A redhead. XP

I never thouht of her as brunette. :)

You'd have to be blind to think she's a brunette instead of a redhead. Actually, even a blind person could see this obvious answer.

I consider her a brunette, but to be honest it's a bit hard, since in some parts of the movie her hair looks red, while in others she's definitely a brunette.

^ That is what i was always thinking.
I don´t know if other countries have that haircolor name, but in germany there are a few nuances of brown with red in it, so the hair sometimes looks more reddish then brown, but it´s still called brown XD