Choi So-mi of I.O.I attended the Waterbomb Festival held in Busan on August 8th, proving her status as a 'Waterbomb Goddess.' She shared behind-the-scenes photos on Instagram showing herself completely soaked after her performance, and impressed fans with her flawless beauty and healthy physique despite being drenched. I.O.I released their third mini album 'I.O.I: LOOP' in May and is currently commemorating their 10th debut anniversary.