SISTAR's Soyu revealed how she's been keeping in shape since her debut on the June 24th episode of KBS2's '1 vs 100'.

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As the first contestant up, Soyu answered a question from gymnast Shin Soo Ji, who asked, "Soyu's frame is pretty, and her body is toned. I'm curious if there's an exercise that you consistently do."

Soyu answered, "When I was younger, I was really skinny, but when I began living dorm life, my eating habits changed and I started to gain weight. I do things like flying yoga or water skiing not to lose weight, but I try to exercise to have fun."

Well, whatever she's doing, it seems to be working! Don't you think?