I.O.I has made a comeback to celebrate their 10th debut anniversary with a new mini-album 'I.O.I : LOOP'. The group has been featured on various music shows such as '뮤직뱅크' and '엠카', with their song '갑자기' gaining attention. Members have shared their feelings about the reunion, expressing gratitude and happiness. - I.O.I released their third mini-album 'I.O.I : LOOP' on May 19 to commemorate their 10th debut anniversary. - The group appeared on '뮤직뱅크' and performed their new song '갑자기'. - Members have shared emotional moments and feelings about their reunion on social media and YouTube channels. Q: Why is this trending? A: I.O.I is trending due to their highly anticipated reunion after 10 years, marking a significant moment in K-pop history. | I.O.I has made a comeback to celebrate their 10th debut anniversary with a new mini-album 'I.O.I : LOOP'. The group has been featured on various music shows such as '뮤직뱅크' and '엠카', with their song '갑자기' gaining attention. Members have shared their feelings about the reunion, expressing gratitude and happiness. - I.O.I released their third mini-album 'I.O.I : LOOP' on May 19 to commemorate their 10th debut anniversary. - The group appeared on '뮤직뱅크' and performed their new song '갑자기'. - Members have shared emotional moments and feelings about their reunion on social media and YouTube channels. Q: Why is this trending? A: I.O.I is trending due to their highly anticipated reunion after 10 years, marking a significant moment in K-pop history.