Girls' Generation's Sunny visited DJ Jung Hyung Don on his radio show, MBC Radio FM4U's 'Jung Hyung Don's Music Camp'.

The 'Infinity Challenge' cast are becoming one-day DJs, and Sunny happened to catch Jung Hyung Don on the day he took over for regular DJ Bae Chul Soo. He said during the show on September 11, "There's 3 minutes left, but Bae Chul Soo and Sunny are here."Bae Chul Soo responded, "You only wanted Sunny here, didn't you?"

Sunny explained that Jung Hyung Don wouldn't be that happy to see her, saying, "He could be unhappy I'm visiting. I attack him often. I visited because I wanted to make fun of him. How can you cut off each syllable of each word? It's interesting." Bae Chul Soo defended the comedian, "[He was okay as a DJ host]."

The Girls' Generation member put Jung Hyung Don on the spot by saying that he was actually making fun of Bae Chul Soo's particular way of speaking, and he said, "Why are you being unfair? Why is it okay if I do it and not if Jung Hyung Don does it?"

Jung Hyung Don responded, "That's why I don't do it. I can't because of Sunny."