On the most recent episode of the MBC entertainment program 'Infinite Challenge,' which aired on December 20, 2014, the Infinite Challenge members were surprised to see the 1990s pop star Lee Jung Hyun's unchanged beauty. On this day's episode, Infinite Challenge members invited 1990s pop stars for their special episode called 'Saturday Saturday Is a Singer.' They met singer Lee Jung Hyun, and were surprised to see her look the same as she did 15 years ago. Haha said, "You are the same age as me. This is crazy, you are not a human," and made everyone else laugh. In related news, on the most recent episode of the popular MBC entertainment program 'Infinite Challenge,' the members recruited popular singers from the 1990s and hosted a stage performance, showing popular songs from the 1990s. The MBC entertainment program 'Infinite Challenge' is one of the popular, long lasting entertainment programs in Korea. It features the Infinite Challenge members Ha Ha, Park Myung Soo, Yoo Jae Suk, Jung Joon Ha, and Jung Hyung Don.