f(x) (에프엑스) KOREAN f(x) – When I’m Alone When I’m Alone 4 Walls 2015.10.27 Victoria, Amber, Luna, Krystal Lyrics/작사: 조윤경 Composer/작곡: Bonnie McKee, Matt Radosevich, Steven Robson, Carly Rae Jepsen,…