Mnet's 'M! Countdown' is back for its weekly show featuring performances by your favorite artists!

On this week's episode, NCT WISH debuted with "Wish", BOY STORY made a comeback with "Alpha", and ICHILLIN' returned with "On My Lips".

As for the winners, BIBI and LE SSERAFIM were the nominees, but it was LE SSERAFIM who took the win with "EASY". Congratulations to LE SSERAFIM!

Other performers included Lim Kim & 1MILLION, LE SSERAFIM, CRAVITY, AIMERS, Taeyong, NOMAD, A.C.E, TRI.BE, X:IN, n.SSign, and The Wind. 

Watch the performances below!

WINNER:

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DEBUT: NCT WISH

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COMEBACK: BOY STORY

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COMEBACK: ICHILLIN'

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Lim Kim & 1MILLION

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LE SSERAFIM

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CRAVITY

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AIMERS

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Taeyong

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NOMAD

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A.C.E

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TRI.BE

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X:IN

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n.SSign

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The Wind

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