On the most recent episode of the MBC entertainment program 'Infinite Challenge,' which aired on December 20, 2014, the Infinite Challenge members met with the 1990s pop star Lee Jung Hyun.

On this day's episode, Infinite Challenge members were surprised to see that she looked the same as she did 15 years ago. After yesterday's 'Saturday Saturday Is a Singer.' episode of 'Infinite Challenge' aired, it was found out that singer Lee Jung Hyun had performed at Lady Gaga's concert back in 2009. She said in an interview with a radio program last year that she was invited to perform at opening ceremony of Lady Gaga's concert and got on stage.

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.