Help me find this song :)

So I heard a bit this song in k-pop ultimate audition (that main girl singing) so I thought it sounded really familiar and it's propably one of the songs I have listened XD haha but still I can't bring myself to remember what song and by who it is? o_o it goes like this "nege annyeong guro narajiman..." i thought it would be nice song to sing, so I'd like to remember what song it is. ^^