The age old question...
I'd have to say it is a heated contest between Japan, Brazil, and any Arab nation.
Japanese
http://i169.photobucket.com/albums/u...isc/M82993.jpg
Arab
http://i194.photobucket.com/albums/z...rabic-eyes.jpg
Brazilian (during Carnaval)
http://img5.travelblog.org/Photos/1/...Carnival-0.jpg