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

On this week's episode, woo!ah! debuted with "woo!ah!", Natty debuted with "Nineteen", Moon Jong Up made a debut with "Headache", and Park Kang Sung x Rue debuted with "Dear Dad". NU'EST came back with "I'm in Trouble", BVNDIT made a comeback with "Jungle", Bolbbalgan4 came back with "Hug", ASTRO returned with "Knock", Busters made their return with "Paeonia", Fanatics returned with "V.A.V.I. GIRL", DooRi came back with "Beauty Advisory", Noir made a comeback with "Lucifer", and Yoon Tae Kyung returned with "Kissing You". 

As for the winners, Oh My Girl and ASTRO were the nominees, but it was Oh My Girl who took the win with "Nonstop". Congratulations to Oh My Girl!

Performances also included Oh My Girl, H&D, CRAVITY, Lee Dae Won, Dickpunks, and Cheeze.

Watch the performances below!

WINNER:

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DEBUT: woo!ah!

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DEBUT: Natty

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DEBUT: Moon Jong Up

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DEBUT: Park Kang Sung x Rue

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COMEBACK: NU'EST

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COMEBACK: BVNDIT

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COMEBACK: Bolbbalgan4

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COMEBACK: ASTRO

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COMEBACK: Busters

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COMEBACK: Fanatics

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COMEBACK: DooRi

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COMEBACK: Noir

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COMEBACK: Yoon Tae Kyung

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Oh My Girl

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H&D

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CRAVITY

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Lee Dae Won

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Dickpunks

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Cheeze

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