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According to his label Maroo Entertainment, Kim Jong Kook's debut single "Hate That Happiness Came" was released on August 23 through both KUGOU MUSIC and KUWO MUSIC. About his debut Chinese song, Kim Jong Kook said, "I have a big image in China as a variety show guy. I wanted to show fans my singer side, so I decided to release this single. I will give fans an image of me singing as a musician."

Do you think Kim Jong Kook will be just as popular as a singer? Listen to a preview of the song below!