[3] Moreover, he commentates several professional football matches as a maniatic perspective, when the national team plays, including 2006 World Cup and 2008 Beijing Olympics.

[4] After graduation, with strong suggestion from Korean pop singer, his friend Yoon Do-hyun (lead singer of YB), and bassist Ko Beum-jun, he started his musical career in 1997, with a creation of a band called 'Hot Potato' (뜨거운 감자).

[5] His popularity has increased, since April 2006, he joined the guest of the Friday-night popular music variety programme, Yoon Do-hyun's Love Letter, hosting a segment called Making a gorgeous world with 'slanting' Kim C (삐딱이 김C와 아름다운 세상 만들기, ~ May 2007) on KBS2.

Previously, he quoted about his frequent media appearances that, the reason why he acts in such variety shows is to advertise his music.

), "Lady Away Following Spring Blows" (봄바람 따라간 여인), and most recently with "Rain Tears" (비 눈물).

Since October 2007, he appeared on the KBS2's Happy Sunday: 1 Night 2 Days (1박2일) as one of the regular cast members, himself replacing Ji Sang Ryul.

In his first episode, while stuck with no money and food, Kim, together with ballad singer Lee Seung-gi with the host Kang Ho-dong sang and played the guitar, earning about ₩8,866.

Meanwhile, Kim C released a movie soundtrack ‘See Saw’ as part of band Hot Potato which is well received by music fans.