My favorite singer

My favorite singer is 'f(x)'. It is Korean girl group and there are five members in it. There are three Korean menbers, one American and one Chinese member. They debut on 2009 with their single album 'LAchaTA'. For the following, they had a big hit on their next albums 'chu~' and 'NuABO'. I like f(x) because they have each of the member has their own style and they always work hard even they are young.