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

On this episode, HyunA returned with "How's This", MONSTA X made a comeback with "Stuck", UP10TION made their comeback with "Tonight", Oh My Girl came back with "A-ing", Nine Muses A debuted with "Lip2Lip", Luizy (Seungyoun) and BTOB's Hyunsik sang "Baby Ride", FLASHE came back with "Cutie Girl", 24K returned with "Still 24K", Jun.K made his solo comeback with "Think About You", J-Min was back with "Ready for Your Love", INX debuted with "Alright", and IOI's subunit debuted with "Whatta Man".

As for the winners, HyunA and Oh My Girl were nominated for 1st place, but it was HyunA who took the win with "How's This"! Congratulations to HyunA!

Other performers this episode were NCT 127, ASTRO, Snuper, G-Friend, Stellar, and DJ Joy. 

Check out the performances below!

SEE ALSO: G-Friend win #1 + Performances from July 28th 'M! Countdown'!

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DEBUT: Nine Muses A

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DEBUT: INX

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DEBUT: IOI subunit

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COMEBACK: HyunA

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COMEBACK: MONSTA X

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COMEBACK: UP10TION

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COMEBACK: Oh My Girl

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COMEBACK: FLASHE

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COMEBACK: 24K

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COMEBACK: Jun.K

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COMEBACK: J-Min

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NEW RELEASE: Luizy & Hyunsik

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NCT 127

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ASTRO

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Snuper

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G-Friend

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Stellar

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DJ Joy

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