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

On this week's episode, bugAboo debuted with "bugAboo", Eunhyuk debuted with "Be", and Cho Hye Sun debuted with "Don't Leave Me". As for comebacks, NCT 127 came back with "Favorite (Vampire)", Ailee returned with "Don't Teach Me", DKB made a comeback with "Rollercoaster", Park Ji Hoon came back with "Serious", EPEX returned with "Do 4 Me", Seventeen made a comeback with "Rock with You", CL came back with "Let It", INFINITE's Woohyun returned with "Calm & Passion", Lee Jin Hyuk made a comeback with "Work Work", and Kingdom came back with "Black Crown".

As for the winners, Seventeen and aespa were the nominees, but it was Seventeen who took the win with "Rock with You". Congratulations to Seventeen!

Other performers included ENHYPEN and LIGHTSUM as well as special stages by TO1 and HolyBang.

Watch the performances below!

WINNER:

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DEBUT: bugAboo

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DEBUT: Eunhyuk

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DEBUT: Cho Hye Sun

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COMEBACK: NCT 127

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COMEBACK: Ailee

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COMEBACK: DKB

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COMEBACK: Park Ji Hoon

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COMEBACK: EPEX

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COMEBACK: Seventeen

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COMEBACK: CL

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COMEBACK: Woohyun

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COMEBACK: Lee Jin Hyuk

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COMEBACK: Kingdom

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ENHYPEN

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LIGHTSUM

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TO1

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HolyBang

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