Soyu revealed the details of her harsh diet on JTBC's 'Soyu x Hani's Beauty View'.

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On the January 4th premiere, Soyu met up with her co-host EXID's Hani for the first time, and they went to grab a meal of spicy chicken feet. Hani asked the former SISTAR member how she keeps in shape, and Soyu responded, "I'm not skinny for a celebrity."

Hani then commented, "I saw your bikini pictorial," complimenting her amazing body. Soyu responded, "I lost 8kg (17lbs 10oz) in one month. I practically didn't eat. I ate the whites of 4 quail eggs and about half a cup of milk for my meals for the day."

Wow!