Sortie: 7 Sept. 2011
![Sekaiichi HAPPY na Onna no ko [07.09.2011]](https://ekladata.com/T5Oe_-jBMIJM8t0aa4WsYhq_bM8@281x319.jpg)
Tracklist:
Sekaiichi Happy na Onna no ko
Idai na Chikara wo!
Sekaiichi Happy na Onna no ko (Instrumental)
![Sekaiichi HAPPY na Onna no ko [07.09.2011]](https://ekladata.com/93Gqy5aKjZ7c7pPRJpGLVfJ36AM@261x261.jpg)
[Limited A]
Tracklist:
Voir regular
DVD:
Sekaiichi HAPPY na Onna no ko
![Sekaiichi HAPPY na Onna no ko [07.09.2011]](https://ekladata.com/U94CYwqXnV2KUKXvuKL74yiGhY4@285x285.jpg)
[Limited B]
Tracklist:
Voir regular
DVD:
Sekaiichi HAPPY na Onna no ko (Color Box vers.)
![Sekaiichi HAPPY na Onna no ko [07.09.2011]](https://ekladata.com/1IwOA7S3xTvFnU3NU2mFdmpPbYA@242x240.jpg)
[Single V]
Tracklist:
Sekaiichi Happy na Onna no Ko (MV)
Sekaiichi Happy na Onna no ko (Close-up Ver.)
Making of

[Event V]
Tracklist:
Sekaiichi HAPPY na Onna no ko (Yajima Maimi Solo Ver.)
Sekaiichi HAPPY na Onna no ko (Nakajima Saki Solo Ver.)
Sekaiichi HAPPY na Onna no Ko (Suzuki Airi Solo Ver.)
Sekaiichi HAPPY na Onna no Ko (Okai Chisato Solo Ver.)
Sekaiichi HAPPY na Onna no Ko (Hagiwara Mai Solo Ver.)
Infos:
MV:
•Le 17ème single du groupe et 17ème en Major
•Il s'est vendu à 21,440 exemplaires