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

On this episode, Lady Jane returned with "Just 2 Days", VIXX made a comeback with "Fantasy", Sleepy came back with "What Did I Do Wrong?", I.B.I debuted with "Molae Molae", and Cosmic Girls returned with "Secret".

As for the winners, IOI and Black Pink were nominated for 1st place, but it was IOI who took the win with "Whatta Man"! Congratulations to IOI!

Other performers this episode were HyunA, UP10TION, Nine Muses A, Jun.K, J-Min, NCT 127, IOI, Stellar, Gavy NJ, Rion Five, and Vromance. 

Check out the performances below!

SEE ALSO: Actor Choo Young Woo issues apology for verbal misstep during 'The Trauma Code: Heroes on Call' Interview

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COMEBACK: Lady Jane

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COMEBACK: VIXX

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COMEBACK: Sleepy

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COMEBACK: Cosmic Girls

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DEBUT: I.B.I

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HyunA

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UP10TION

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Nine Muses A

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Jun.K

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J-Min

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NCT 127

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IOI

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Stellar

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Gavy NJ

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Rion Five

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Vromance

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