"Infinite Challenge" G Dragon expressed his content with Jung Hyung Don's singing style.

On the October 6, 2013, episode of MBC "Infinite Challenge," G Dragon and Jung Hyung Don recorded their song for the "Freedom Highway Music Festival."

On that day, G Dragon, who was observing Jung Hyung Don's recording process, said it doesn't content him.

Jung Hyung Don replied, "Pick one between producing sound from my neck or from my stomach." G Dragon then asked, "What do you mean by producing sound from your stomach?"

Jung Hyung Don explained it as 복식, then showed him the sound from his stomach. G Dragon kept saying, "good," expressing his content.

G Dragon then said, "Let's go with the stomach." Jung Hyung Don, taken aback, asked, "Do we really go with this style?" G Dragon replied, "This is totally my style. I think picking you [as a partner] was a really good decision."