Some of the most popular cosplay costumes come from anime and video games. There are some that cross over like Tomb Raider---because that was a movie---and television shows like Game of Thrones.
Characters like Daenerys Targaryen are super popular in the Cosplay Community.
The above video shows her in a bunch of cosplay outfits, including Wonderwoman.
Star Wars and Star Trek are also really big in the cosplay community.
Here is a site with a bunch of Cosplay Ladies:
http://thechive.com/2013/04/19/bless-the-god-of-geeks-for-beautiful-cosplay-girls-42-photos/