my answer is definitely Gyuri, i saw her when i was watchin' ''pretty girl'' mv.
i think she is very unique among the other members n her appearance just doesn't like Korean.
u can't resist her beautiful eyes n i found that cameras love her so much when i was watchin' their performance. then i tried to know more abt the other members.
later, after watchin' the performance of ''Break it''. I think SungHee sings well n she reli looks like Hyori Lee