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In page Yuna (singer, born 1992):

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On July 30, 2012, Yuna made her debut as a member of AOA on Mnet's M! Countdown with their debut single album, Angels' Story and the title track "Elvis".[1] AOA has released three EPs and nine singles as of June 22, 2015.[2] She is part of AOA's subunit "AOA Black". In 2015, AOA traveled to Hainan where they filmed One Fine Day, a variety program in which idols/idol groups go on a "healing" vacation. They were the seventh idol group to appear on the program(followed by Girl's Day)[citation needed]