DIA (다이아) KOREAN DIA – Say Hello Say Hello Do It Amazing 2015.09.15 Seunghee, Eunice, Cathy, Jenny, Yebin, Eunjin, Chaeyeon Lyrics/작사: 몬스터팩토리 Composer/작곡: 양승욱, 빅톤 (Bigtone) Arranger/편곡: 양승욱,…