This is the only fancam I've seen so far. If ever I see a better and more clear version of this performance, I'll update this post. For the mean time, you can watch here how they did and how Kyu Jong suddenly appeared on stage and dance, while Young Saeng sings Jjunie too. ^^ Well, eventually, Kyu Jong sang on the later part. ^^ Really enjoyed watching it. ^^ 재미있다 허영생 김규종 김형준! ^^ You can also hear them say at the end of the performance '지금까지 SS501이었습니다~ 감사합니다!'. That line,.... makes me feel emotional.
credits: 무한규종교@yt + 韓茄子@yt