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Japan's girl pop group AKB48 members (L-R) Yuki Kashiwagi, Mayu Watanabe, Yui Yokoyama and Rena Kato pose for photographs as Japanese social networking service (SNS) company Line announces the company's live streaming service for entertainment, artists' performances and their daily lives during a press conference in Tokyo on December 10, 2015. AKB48 's total sales for a CD single marked 36,158,000 copies, the most ever by a recording artists in Japan, a survey announced on December 10. AFP PHOTO / Yoshikazu TSUNO / AFP / YOSHIKAZU TSUNO (Photo credit should read YOSHIKAZU TSUNO/AFP/Getty Images)

Japan's girl pop group AKB48 members (L-R) Yuki Kashiwagi, Mayu Watanabe, Yui Yokoyama and Rena Kato pose for photographs as Japanese social networking service (SNS) company Line announces the company's live streaming service for entertainment, artists' performances and their daily lives during a press conference in Tokyo on December 10, 2015. AKB48 's total sales for a CD single marked 36,158,000 copies, the most ever by a recording artists in Japan, a survey announced on December 10.  AFP PHOTO / Yoshikazu TSUNO / AFP / YOSHIKAZU TSUNO        (Photo credit should read YOSHIKAZU TSUNO/AFP/Getty Images)