On the most recent episode of the MBC entertainment program 'Infinite Challenge,' which aired on December 20, 2014, the Infinite Challenge members recruited Shoo of S. E. S., a popular girl group of the 1990s for their 'Saturday Saturday Is a Signer' performance. They had been preparing for the stage performance with a lineup of popular singers from the 1990s. On this day's episode, the Infinite Challenge members met with Shoo of S. E. S., a popular girl group of the 1990s. Shoo made the members laugh with her funny comments, which was a complete opposite from her S. E. S. days in the 1990s. She wore a leopard jacket on this day, and said, "I had to change my pants right before filming this because my child dropped food on them." 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 popular 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.