So I am going to join a contest that will be held this Saturday by Etude House.

The contest name is "Korean Look a Like" and they want to find girls that are well, Korean look a like.

They want the cotestants to dress and do their hair like Koreans, and also do the make up like korean.

So, I would like to ask for your help please, could any of you tell me what should I wear and how should I do my hair :(

Of the theme is Casual :D

I don't know why but this sounds kinda.... racist ? Lol, maybe its just me. Anyway please help 

oh, so you're just gonna look korean, not like a specific korean celebrity or something?

Hmm... I don't know much about this, but if i were you I would probably take a look at some music videos from some of the famous korean groups to get some ideas! :)

I just know a few: Girls Generation, Wondergirls ^^' But there are lot more ^^

When I think korean fashion I think ulzzang.There are many hair and makeup tutorials for this online, I think this is probably what they are looking for in this competition :)

Tumblr has a lot of ulzzang pics. You can just search the tag "ulzzang" or "uhljjang" to find pics.

I follow this blog specifically: http://fuckyeahuhljjang.tumblr.com/

There is a famous Korean makeup artist on youtube who posts a lot of makeup tutorials. They are mostly in Korean, but they are very clear and pretty easy to understand. She posts so many looks that are popular in Korea. http://www.youtube.com/user/jungsaemmool

You can also try visiting the korean websites or viewing the past campaigns of Etude House, Lioele, VOV, and TonyMoly and seeing what their previous spokesgirls looked like -- how they did their makeup and hair. 

Etude House has a really girly cute style, so I would try watching some kpop videos with a similar style. 
♥ Orange Caramel's "Magic Girl" is very cute: http://www.youtube.com/watch?v=btqtftCnC-s&feature=related

And here are bunches of etude house commercials: http://www.youtube.com/results?search_query=etude+house+cm&aq=f

I know you're looking for hair tips, but here's a video of makeup application tips from etude house (for their peach line): http://www.youtube.com/watch?v=0VkGdeNvMlQ

It might be useful to see how *they* want their makeup used. 

Hope this helps and good luck!