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Milestone · Selected members

I.O.I 10th Anniversary Celebration & Reunion

I.O.I 데뷔 10주년

May 4, 2026

Nayoung Chungha Sejeong Chaeyeon Sohye Yeonjung Yoojung Doyeon Somi

About this activity

Ten years to the day since I.O.I debuted, with the nine-member reunion confirmed in February and the I.O.I : LOOP comeback two weeks away.

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I.O.I 10th Anniversary Celebration & Reunion - I.O.I : LOOP era visual — I.O.I : LOOP

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I.O.I 10th Anniversary Celebration & Reunion · 2026-05-04 | I.O.I Activity | I.O.I fan base