Yoo Se Yoon and Leeteuk made a lip sync collaboration in a video clip! Yoo Se Yoon uploaded the clip for his 'Monthly Yoo Se Yoon' project, which is basically a parody of Yoon Jong Shin's ongoing monthly project. The video's description read, "Monthly Yoo Se Yoon's third project is Yoo Se Yoon x Leeteuk collab?!"