Hijab is a Islamic responsibility on Muslim women to protect her modesty and to protect her from wrong eyes. In recent years the Fashion has even taken over the industry of Hijab and now a days lot of Fashionable Hijabs are coming into market.
So are these Fashionable Hijab Allowed in light of Islam or not? Well if the Hijab is properly covering you then its allowed but if you are not properly getting covered by Hijab then it will not be allowed in light of Islam.
You can do fashion by staying in limit. don't expose your body. don't wear attractive or tight dresses. cover yourself properly.