K.O.
You need to let it go. I am a big tom boy with a girly girl. I have no idea how that happened!! She's got me, local grandma who is even more tom-boyish than me, and three brothers - but oh the world is ending if I even make a suggestion of wearing pants.
I still do believe that girly girls do tend to be more high maintenance. But so what? It's her life to live. Even as a low maintenance tom boy, I still look at the beautiful, put together women always pristinely dressed and think admiringly "where do they find the time to do that everyday?" And as far as men go down way down the line - I think they are much more appreciative of the women that put more of an effort into all of that stuff. While I love being who I am and very low key, and really wish my daughter followed suit (I hate the girly girl stuff) there's not anything negative associated to it.
There's also emotional high maintenance, and being a girly girl doesn't necessarily equate to ending up like that.