According to JYP Entertainment, Sunmi will be coming back, three years and 7 months after her leave from the Wonder Girls. J.Y. Park himself took over her complete production, including dance, MV, outfits, and of course, the song. 

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There's no set date yet on her music release, but Sunmi will have her solo debut stage on the August 22 episode of 'M! Countdown'. 

Are you ready for Sunmi?

Source: Chosun.com, bnt News via Nate
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