Despite the fact that Girls' Generation and f(x) are two popular girl groups in Korea, Jessica and her sister, Krystal have never met each other on variety shows until today. The Jung sisters attended the recording of SBS The Incredible Competition Star King today. Since this was their first time appearing on a variety show together, the show is expected to gain a lot of attention from the viewers. On the show, Jessica and Krystal were amazed with the skills shown by magician Jo Young Ho and Chu Seong Ho. Hopefully, we get to see more of Jung Sisters on variety shows in the future.