On March 17, 1theK official YouTube channel released a teaser of Hong Jin Young's new song "Thumb Up".�

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Hong Jin Young illuminates bright and bubbly energy. Her new song is also full of positive vibe as it aims to give great encouragement to listeners. In addition, pop art theme is applied to the MV to create the colorful and fun view.�

Hong Jin Young's teaser is already getting much "Thumb Up". The full release of her new song will take place on March 24.�