2AM's Jinwoon once expressed that he wanted to fulfill a childhood dream of his, which was to debut as a rockstar. His day has finally come, as Jinwoon held his debut rock performance at this year's Jisan Valley Rock Festival today. Performing alongside many international bands, Jinwoon made his solo debut in front of a crowd of 84,000. Although he was tired from Infinity Challenge's rowing competition, held earlier on that day, the singer exploded with passion and brought an exciting stage for the audience. He also gave some extra fan service by ripping off his shirt, revealing his toned body. [gallery columns=4] Producer Bang Shi Hyuk tweeted his praise for Jinwoon's performance, saying, "Our little Jinwoon took his shirt off! You're so cool!" Fans left messages of support such as, "Jung Jinwoon is a man~", "Who said to take off your shirt like that!", "I regret not going", and "Rock-kid daebak!" Jinwoon's single was officially released on August 1st. Source + Image: Newsen