Group Wondergirls has been noted to sign around 1000 signatures a day.

On KBS 2TV 'Star Life Theatre-Wondergirls' which aired on 13th, the images of Wondergirls who has started promoting in Korea has been broadcasted.

Image of signatures in backstage room was captured; when asked "How many signs do you do per day?", Yoobin answered "Hmm... I think when we first start promoting I think we do about 1000 signatures per day", to everyone's surprise.