Red Velvet win #1 + Performances from September 17th 'M! Countdown'!

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

On this episode, Kangnam made his comeback with "Chocolate", Roh Ji Hoon returned with "If You Were Me", Dia debuted with "Somehow", CNBLUE made a comeback with "Cinderella", Jessi came back with "SSENUNNI", and Heart B returned with "Beautiful".

As for the winners, Red Velvet and Junjin were the nominees, but it was Red Velvet who took the final win with "Dumb Dumb"! Congratulations to Red Velvet!

Other performers of the night were: Red Velvet, MONSTA X, Big Star, Seventeen, UP10TION, Junjin, LPG, Nop.K, BEAT WIN, SONAMOO, April, The Legend, 2EYES, myB, JJCC, and Poppin' Hyun Joon. 

SEE ALSO: Girls' Generation win #1 + Performances from September 10th 'M! Countdown'!

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DEBUT: Dia

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COMEBACK: Kangnam

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COMEBACK: Roh Ji Hoon

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COMEBACK: CNBLUE

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COMEBACK: Jessi

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COMEBACK: Heart B

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Red Velvet

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MONSTA X

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Big Star

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Seventeen

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UP10TION

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Junjin

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LPG

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Nop.K

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BEAT WIN

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SONAMOO

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April

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The Legend

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2EYES

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myB

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JJCC

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Poppin' Hyun Joon

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