収録内容

[Disc 1]

1. HAPPY HAPPY (日本ｺｶ･ｺｰﾗ Qoo CMｿﾝｸﾞ)

2. The Best Thing I Ever Did -Japanese ver.-

3. HAPPY HAPPY (collapsedone Remix)

4. HAPPY HAPPY (Instrumental)

[Disc 2]

1. [DVD] HAPPY HAPPY (Music Video)

2. [DVD] HAPPY HAPPY (Music Video Making Movie)