Singer Jung Yup's cousin, Gamjay, has joined Kim Woo Joo to form a duo called Old Time. With the new member, Gamjay, Old Time recently made their debut stage on KBS's "Music Bank" on February 11th. Member Kim Woo Joo is famous as TVXQ's Yunho's best friend and fan for the last decade.  They had previously shown off their closeness with each other last year when Yunho appeared in J. Rich's music video, who is a part of Kim Woo Joo's team. After their first performance, Kim Woo Joo left a message on Twitter saying, "I got in trouble with Yunho after rehearsal. I am, however, grateful for that. But I'm still scared of Yunho when I am at the broadcasting stations." Also of note is that rapper Gamjay has been receiving attention as Brown Eyed Soul's Jung Yup's cousin.  Before his debut, Gamjay was an underground rapper, and he has already performed more than 100 times in various places. Check out their skills below! http://www.youtube.com/watch?v=1IoUZzPvqew Source + Picture: Newsen via Yahoo! Korea