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Wikipedia definition
1. Happy (Koharu Kusumi song)is the third solo single of Morning Musume and Hello! Project member Koharu Kusumi, under the artist name "Kirari Tsukishima starring Koharu Kusumi (Morning Musume)" . It was released on May 2, 2007 as a regular edition CD and limited edition CD with catalogue numbers EPCE-5470 and EPCE-5469 respectively. "Happy" was used as the third opening theme song of the anime Kirarin Revolution, a series in which the main protagonist is voiced by Kusumi.
Read “Happy (Koharu Kusumi song)” on English Wikipedia
Read “ハッピー☆彡” on Japanese Wikipedia
Read “Happy (Koharu Kusumi song)” on DBpedia

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