F.T.Island's Lee Hongki shared his stories on today's episode of Strong Heart about always going off key and cracking his voice while singing. He also spoke about being called a "hand-sync band," which is a term that people use to describe bands that play with their instruments for recording, then only pretend to play the instruments during actual performances. Lee Hongki first talked about his mistake on SBS Gayo Daejun where he went off key. He said, "I wasn't feeling well and I did make a mistake." He was so sick that he had to go to the hospital after the performance. He continued, "After that, even when I tried really hard and did well live, people accused me of lipsyncing." He spoke about being called a handsync band, saying, "It hurt a lot to hear that. We will work harder to be recognized for our talents." What fans don't know is that instruments aren't allowed to be played live on live broadcast music programs.