Well, what i would do is cut some more of the white edges off of the woman, even in the hair and just get creative with that part, however you do it(vector mask, layer mask, etc). People are not as likely to notice, or care when you do this with a vector mask, in fact in a lot of publications, vector masks are used extensively. Or if you know how to cutout hair using channels, go at it. Either way you do it, you need to get some more white out of the edges, unless of course youre going for an outer glow. Which i am assuming youre not. There are a million ways to go at this, but I would likely chose a vector mask mixed with either Filter-->Extract, or other advanced channel operations.