'Infinite Challenge' member Jung Joon Ha changed into Bangbaedong Nora, a member of the girls group Girls' Day. 'Infinite Challenge' member Jung Joon Ha posted on his Instagram on December 29, 2014, "Girls' Day fans, I'm sorry!" and shared two photos of himself. One was a selfie of himself wearing a Girls' Day dress, and a matching ribbon. The other photo was with actress Kim So Hyun and Girls' Day Hyeri. In related news, 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.