I.O.I – 똑 똑 똑 Knock Knock Knock

Singers: I.O.I

Albums: I.O.I – I.O.I - Chrysalis

Song video I.O.I – 똑 똑 똑 Knock Knock Knock

Video:

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Album

I.O.I – I.O.I - Chrysalis

I.O.I – Pick Me

I.O.I – 벚꽃이 지면 When The Cherry Blossoms Fade

I.O.I – Doo Wap

I.O.I – 똑 똑 똑 Knock Knock Knock

I.O.I – I.O.I (Intro)