Sekaiichi Happy na Onna no Ko

"Sekaiichi Happy na Onna no Ko"
Regular Edition cover
Single by Cute
from the album Dai Nana Shō 'Utsukushikutte Gomen ne'
B-side	"Idai na Chikara o!"
Released	September 7, 2011 (2011-09-07) (Japan)
Format	CD single, Single V
Genre	J-pop
Length	13:38
Label	Zetima
Songwriter(s)	Tsunku
Producer(s)	Tsunku
Cute singles chronology
"Momoiro Sparkling" (2011) "Sekaiichi Happy na Onna no Ko" (2011) "Kimi wa Jitensha Watashi wa Densha de Kitaku" (2012)
Berryz Kobo×Cute singles chronology
"Amazuppai Haru ni Sakura Saku" (2011)
Hello! Project Mobekimasu singles chronology
"Busu ni Naranai Tetsugaku" (2011)
Music video
"Sekaiichi Happy na Onna no Ko" on YouTube

"Sekaiichi Happy na Onna no Ko" (世界一HAPPYな女の子^?, "The happiest girl in the world") is the 17th major single by the Japanese idol group Cute, released in Japan on September 7, 2011 on the Zetima label.

The single will be released in three versions: Regular Edition (catalog number EPCE-5816), and Limited Editions A (EPCE-5812/3) and B (EPCE-5814/5) that include a bonus DVD. Limited Edition A DVD will contain the "Sekaiichi Happy na Onna no Ko (Dance Shot Ver.)" music video, and Limited Edition B will have "Sekaiichi Happy na Onna no Ko (Color Box Ver.)".

The Single V will be released on September 14.

All tracks written by Tsunku.

Sealed into all the limited editions