Every member of Wonder Girls has a stunning body that any girl would love, but fans are starting to worry about Yoobin’s dwindling weight.

An online community board recently uploaded some pictures of Yoobin, from their concert in Malaysia, with the rest of the members, showing just how tiny she has become. Sohee, who has always been the skinniest girl in the group, is definitely getting some competition from Yoobin.

There have been rumors floating around that at a stage, Yoobin gained a lot of weight and jumped rope for hours on a daily basis to lose all the weight.

While she does look beautiful, she needs to make sure that her weight doesn’t drop too much. Stay healthy, Yoobin!