MC Yoo Hee Yeol introduced John Park with, "He's known as the scene stealer in the world of variety. But he shines ever brighter when he sings." 

SEE ALSO: CNBLUE members have hilarious reactions when a former troublesome member appears unexpectedly during a live stream

However, unlike the gentle image John Park gives off when he sings, his variety image could use some work. Yoo Hee Yeol broached this topic first, commenting, "This is your first 'Sketchbook' appearance in two years. Your nicknames have increased tremendously since the last time you were on. What exactly happened?" John Park pinned the blame on Lee Juk, saying, "It's because of Lee Juk. I did a program with him. It was a fake documentary. There was a script for it, and I think people honestly believed that I'm an idiot. After that, I gained a lot of nicknames." 

Yoo Hee Yeol teased the singer, "People say you can't speak English even though you came from the States. Everyone knows that you're from there, so please validate the fact that you can speak English," proceeding to test John Park on his English. 

Check out his performances below including a special rap to Eminem's "Without Me."