2PM's Chansung was a featured guest on the August 9 installment of MBC's 'Radio Star'.  During a segment, he responded to Nichkhun's hair loss concerns.

First, Yoon Jong Shin asked, "Are there idol groups who tighten discipline?" Chansung replied, "There were during the time of our debut. TVXQ sunbaenim, Shinhwa sunbaenim, in addition to Wonder Girls and Big Bang sunbaenims promoting on stage."

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Kim Gu Ra questioned Nichkhun's whereabouts, as Chansung mentioned he was busy performing back and forth between China and Korea, "Nichkhun was worried about his hair loss, is he doing alright?" Chansung replied, "It's not hair loss, he just has thin hair," causing the MC's and guests to laugh.