Star King - Boy or Girl?

Look how pretty this boy/girl?! I was watching Star King and they have this segment "Please teach me" (or something related to that) and the contestants were wearing girls clothes and the celebrity guests will guess if they are girl or boy.

SNSD members were so curious.^^

Everyone was having a commotion because this contestant who wears sailor moon outfit really looks like a girl. I haven't finish the video so I don't know yet if she's really a boy.

What's your guess?
Namja or Yeoja?

Video Credits to Lexipex