While heavy metal is a lifestyle to some people, to many it's just a fashion statement. Take Gossip Girl Taylor Momsen of the Pretty Reckless, for example. She dresses like a hooker, flips people off, and publicly talks about her sexuality in the most awkward ways possible.
That's not called metal; that's called being a 17-year old that grew up with liberal parents. Her music is pop rock at best, but she sports an Iron Maiden shirt in an interview, and all of the sudden she's metal? I don't think so -- though I will give her props for her killer shoes.