DJ DOC's Kim Chang Ryul has introduced his 9-year old son, Joo Hwan.

Kim Chang Ryul and Joo Hwan guested on the October 14th broacast of SBS's '1000 Song Challenge' and formed a team with Jewelry for the karaoke challenge.

MCs Lee Hwi Jae and Jang Yoon Jung were full of compliments for his son saying, "Your son has grown up a lot and is very handsome."

Jang Yoon Jung also added, "He's now 9-years old, but he looks like he's about to enter high school," and to this, Kim Chang Ryul remarked, "He's very shy in front of strangers."

Meanwhile, others who guested on this episode were Baek Ah Yeon, AOA, RaNia, Andamiro, Sunny Days, Kim Sung Hee, 100%, and more.