It is so cool! Her hair piece (I don't know the proper name in English) is amazing!
I dont get why some ppl would be offended. Like, I can understand that you may be angry with someone who is using the native american culture just to depict sexy women, but there are certain pieces, like this one, that... I'm not sure how to say it, kind of... celebrate it? You get the idea.
Anyway, it is a really awesome drawing, that was the point.