On the December 22nd episode of MBC's 'Infinity Challenge', Psy revealed Yoo Jae Suk was originally planned to feature in "Gangnam Style".

Noh Hong Chul mentioned, "Yoo Jae Suk hyung said he almost featured in 'Gangnam Style'." Psy responded jokingly, "It's true. It's a relief he didn't."

He continued, "To be honest, my 6th album was supposed to be a featuring special. Excluding 'Gangnam Style', the other 5 songs [on the album] all feature other artists. Yoon Do Hyun, Park Jung Hyun, Sung Si Kyung, G-Dragon, and Leessang's Gary featured. The reason [Yoo Jae Suk] declined my offer to feature is because of Sagging Snail. It would overlap with the song 'Room Nallari'."

Noh Hong Chul commented bluntly, "It didn't do well. It didn't explode as expected," causing laughter.

Psy explained, "[Yoo Jae Suk] didn't want to do the two songs at once. So I called Lee Juk hyung, and he [kept postponing it]. When I made the call, Jae Dong hyung was next to me and told me he would do it," revealing the behind-the-scenes story.

To make up for declining Psy's offer, Yoo Jae Suk appeared in the music video instead with Noh Hong Chul, who came along on set.

In related news, "Gangnam Style" recently reached over 1 billion views on YouTube.