When artists knock, there goes a performance. This is a program presenting three songs of playlist when there are three times of “knock”. On various backgrounds, a detailed performance takes your heart.
| Genre Music, Dance | Episode Single episode |
| Running time 5m | Cast Various Artists |
Episodes
[4K] Stray Kids – God’s Menu → TOP → EasyㅣKNOCK KNOCK KNOCK 
[4K] TREASURE – BOY → COME TO ME→ Going CrazyㅣKNOCK KNOCK KNOCK 
[4K] KARD – GUNSHOT → Hola Hola → Bomb BombㅣKNOCK KNOCK KNOCK 
[4K] YooA – Bon voyage → Abracadabra → DiverㅣKNOCK KNOCK KNOCK 
[4K] fromis_9 – LOVE BOMB → FUN! → Feel Good (SECRET CODE)ㅣKNOCK KNOCK KNOCK