SM Entertainment’s f(x) has made a remarkable comeback with a new lineup (minus Sulli) and a trippy, minimalist MV with ‘4 Walls’. The song has been a success as it moved straight to the No.1 slot on the Naver charts and various charts in Asia.

Could we be seeing an evolution with f(x) moving towards a more adult contemporary sound with laid back electronic beats? ‘4 Walls’ certainly evokes Euro cool and with their ‘new’ four member lineup we may be seeing f(x) move further towards their status as queens of K-Pop aesthetic.