The MBC entertainment program 'Infinite Challenge' summer music festival participant band Hyuk Oh was given a test to prove their popularity by the MBC entertainment program 'Infinite Challenge' member Jung Hyung Don. The test was to host an impromptu concert and gather over 500 audiences in just a few hours' time, with only help of social media promotion.

On the most recent episode of the popular MBC entertainment program 'Infinite Challenge,' which aired on July 26, 2015, band Hyuk Oh successfully hosted an impromptu concert, which over 800 guests waited in line to attend. Only 500 of them were admitted to attend the concert. In related news, on the most recent episode of the popular MBC entertainment program 'Infinite Challenge,' which aired on July 26, 2015, the MBC entertainment program 'Infinite Challenge' members teamed up with singer songwriters and worked on their songs for the MBC entertainment program 'Infinite Challenge' summer music festival performance. Hip hop mania Jung Joon Ha and electronic music composer Yoon Sang worked on their new song, and IU and Park Myung Soo also tried to find the middle ground between their love for electronic music and acoustic music. 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.