Due to Psy's busy schedule promoting Gangnam Style all over the world, Psy was unable to attending the filming for "Superstar K4".Yoon Gun recently took Psy's seat as a "Superstar K4" judging, judging alongside Yoon Mirae and Lee Seung Chul.

Today Psy tweeted Yoon Gun, "Hyung~ How are you so good at being a judge?! Keke yes, it is true that I am younger than everyone ke."

In response to Psy's tweet, Yoon Gun replied, "Claim number one and hurry back home. Let's have some soju together. Psy fighting!"

There is no word on whether or not Yoon Gun will stay until the end of the season or if Psy will take his seat back as a judge at a later date.

Psy recently returned back to America yesterday, October 19.