Youngji used to be a CCM trainee and she was really good at dancing... She has danced to song like Sherlock(shinee) Bang(after school) Bad Girl Good Girl(Miss A) And many più te will see proof in this links

cerca this for più covers da her : link and also the boys cover : link

In the mostra where they showed off charns and such she showed that she could dance to the songs (some of them)

In Weekly Idol there she danced to sherlock and warrior.

te could also cerca on google: Youngji dance.