Knock. Knock. Trick or treat? Who are you? I m a ghost. I m a little ghost. Knock. Knock. Trick or treat? Who are you? I m a ghost. I m a little ghost. Knock. Knock. Trick or treat? Who are you? I m a cowboy. I m a little cowboy. Knock. Knock. Trick or treat? Who are you? I m a cowboy. I m a little cowboy. Knock. Knock. Trick or treat? Who are you? I m a witch. I m a little witch. Knock. Knock. Trick or treat? Who are you? I m a witch. I m a little witch. Knock编辑于2013/11/01更新