2AM's Jo Kwon, aka the 'kkap king' and huge variety-idol, returned to the show that helped him become as popular as he is now - 'Quiz to Change the World'!

He appeared during the filming for the upcoming episode, which will be a 'Finding Friends' special. This was his first appearance on the show in a while, and he was greeted by rising variety-idol Kangnam!

MC Shin Dong Yup asked Jo Kwon, "As a variety sunbae, do you have any advice for Kangnam on what to be careful about?"

Jo Kwon said to Kangnam, "Popularity isn't forever. Earn a lot while you can." The ever so frank Kim Gu Ra also mentioned, "Kangnam seems to be a little at risk these days, doesn't he? Several programs that Kangnam appeared in have become canceled."

To this, Jo Kwon gave Kangnam wise advice, telling him, "At these times, it's important that you think of a lot of your own ideas and have them prepared for later."

SEE ALSO: Jo Kwon opens up about how he was willing to leave his celebrity life behind for his first love on 'Strong Heart VS'

You can see what else the variety-idols have to say on 'Quiz to Change the World - Finding Friends' edition on March 28 at 11pm KST!

And just 'cause, here's an old video of Jo Kwon showing off his famous 'kkap dance' on an old episode of 'Quiz to Change the World'. Enjoy!