An interesting article on how a woman's hair style affects her power numbers in her occupation. Academic research suggests that women’s hair does matter. For example, some studies have found that women with long hair are associated with decreased forcefulness and seen as high maintenance. Too curly is also a negative.
The link has pictures of Fortune's 50 most powerful women and how they wear their hair, those with the "wrong" hair style (and they are the minority) are marked with an X.