Beschrijving
1.HAPPY HAPPY[3:29]
2.The Best Thing I Ever Did -Japanese ver.-[3:32]
3.HAPPY HAPPY (collapsedone Remix)[3:32]
4.HAPPY HAPPY (Instrumental)[3:27]
1.HAPPY HAPPY[3:29]
2.The Best Thing I Ever Did -Japanese ver.-[3:32]
3.HAPPY HAPPY (collapsedone Remix)[3:32]
4.HAPPY HAPPY (Instrumental)[3:27]