2. Silk Spectre (Watchmen)
This one's pretty damn cool. The Silk Spectre (or Silk Spectre II, to be precise) costume includes a spandex romper suit with garters, metallic grey belt and over the knee boots which are held up by the aforementioned garters. It's quite far removed from what you'd expect from a superheroine costume - more resembling something a dominatrix would wear - yet it somehow works. As well as making actress Malin Akerman look incredibly sexy, she also looks very formidable and intimidating. She could kick some serious behind anyway, but it would be pretty distracting trying to fight her while she was wearing this, regardless of her combat skills.