Hosted by TV Aichi and held in Nagoya, Japan, the World Cosplay Summit is held yearly to promote friendly international exchange. First organized in 2003, the Summit began holding the World Cosplay Championships in 2005. The Summit is held over two days with a cosplayer parade on the first day and the Championships on the second.
For those that don’t know, Cosplay, short for “costume play”, is a type of performance art with roots in science fiction fan culture, in which participants don costumes and accessories to represent a specific character or idea. (Thanks Wikipedia)
And here are the results of the 2011 World Cosplay Championships!