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About Happy
"Happy" is the third opening theme song from the Japanese anime Kirarin Revolution. The song was released on May 2, 2007 and is performed by Koharu Kusumi from Morning Musume, credited as "Kirari Tsukishima starring Koharu Kusumi " . The song was released as Kirari Tsukishima's third single, who Kusumi portrays in the show.
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