CD1 Happy Happy
CD2 The Best Thing I Ever Did -Japanese Ver.-
CD3 Happy Happy (collapsedone Remix)
CD4 Happy Happy (Instrumental)
DVD1 Happy Happy Music Video
DVD2 Happy Happy Music Video Making Movie
Formatos
CD
Editoras
Warner Music Japan
Países
Japão
Anos
2019
Membros
Chae Young,Na Yeon,Jung Yeon,Ji Hyo,Sana (9),Da Hyun,Momo (87),Tzuyu,Mina (33)