A few participants of the singing competitive program 'Mask King' appeared on MBC radio show, 'Park Kyung Lim's 2 O'Clock,' on May 12.

One of the guests, Kahi, said, "At the time I appeared on 'Mask King,' people didn't really know it was me.  Honestly, I went on [the show] with that in mind.  Since I sang with a mask on, I felt like they really listened to me without prejudice.  It was a fun and different experience."

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In relation to another competitor, f(x)'s Luna, Kahi said, "The moment Luna took off her mask, I got goosebumps.  Because I know how hard she must have worked to be acknowledged, I was touched.  I was about to cry."

2AM's Changmin also relayed his thoughts on his experience: "Other people didn't know, but my friends knew right away it was me.  They could tell from my lips that showed through the mask and my performance."