PSY's 'Humdub Show Summer Swag,' a signature K-pop summer performance, took place on the 27th at the Uijeongbu Sports Complex. Park Ji-hoon opened the concert with a surprising appearance in a parody video based on the film 'The King's Warden,' dressed in traditional Korean hanbok as the character Lee Hong-wi. His unexpected appearance was praised as a standout opening that raised the bar for this year's Humdub Show, continuing the tradition of K-pop's summer festival entertainment.