this is the basic term of what an ulzzang is:

If you look at WIKI, this is what you'd get. The definition at least. To me, i understood them as the above average lookers of asia. BECAuse, MOST of them Are of asian heritage. and the term itself is also asian. to be more specific, Korean. anyway, the term use to be just for Koreans! it is now used worldwide and for online and offline useage. For those koreans who've become celebrities off their faces usually get trained into singing and dancing from talent agencies. that's my understanding of Ulzzangs. for more information on the ulzzangs that become of celebrity status, Go to FAMOUS ULZZANGS.

when they mention online contests, many social sites have people who make their own sites to hold contests for people who love to take pictures and show them off for voting. they always have categories. depending on the owner of the site, it'll run how they should want it to.