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

On this week's episode, DAY6 came back with "Melt Down", LE SSERAFIM returned with "Crazy", Yerin made a comeback with "Wavy", BOYNEXTDOOR made their comeback with "Dangerous", ONEWE came back with "OFF ROAD", Younha returned with "Sunfish", and Youngtak made a comeback with "SuperSuper". 

As for the winners, LE SSERAFIM and ZEROBASEONE were the nominees, but it was ZEROBASEONE who took the win with "GOOD SO BAD". Congratulations to ZEROBASEONE!

Other performers included ZEROBASEONE, NMIXX, Oh My Girl, Loossemble, NOWADAYS, DRIPPIN, YOUNG POSSE, and RESCENE.

Watch the performances below!

WINNER:

===

COMEBACK: DAY6

==

COMEBACK: LE SSERAFIM

==

COMEBACK: Yerin

==

COMEBACK: BOYNEXTDOOR

==

COMEBACK: ONEWE

==

COMEBACK: Younha

==

COMEBACK: Youngtak

===

ZEROBASEONE

==

NMIXX

==

Oh My Girl

==

Loossemble

==

NOWADAYS

==

DRIPPIN

==

YOUNG POSSE

==

RESCENE

===

SEE ALSO: Idol stars recommend you check out 'Idol Star Athletics Championships' over the Chuseok break!