That style is very trend driven would argue otherwise. Once you reach a threshold suddenly it's unfashionable to wear hats or floral dresses.

There's actually some really interesting literature about how copyright would significantly hurt the fashion industry, because it is dependent on a large degree of 'copying' styles to create trends, which is key to creating planned obsolescence to keep people buying new clothes.

Edit: A nice TED talk on this, starting at 3:57 http://www.ted.com/talks/johanna_blakley_lessons_from_fashio...