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

On this week's episode, LE SSERAFIM debuted with "Fearless", CLASS:y debuted with "Shut Down", MONSTA X came back with "Love", iKON made a comeback with "But You", Ryeowook returned with "Hiding Words", WOODZ came back with "I Hate You", Psy returned with "That That", and Alice made a comeback with "Power of Love".

As for the winners, MONSTA X and IVE were the nominees, but it was IVE who took the win with "Love Dive". Congratulations to IVE!

Performers included Moon Byul, Miyeon, VERIVERY, Minseo, DKB, ICHILLIN', YOUNITE, and Walking After U.

Watch the performances below!

WINNER:

===

DEBUT: LE SSERAFIM

==

DEBUT: CLASS:y

==

COMEBACK: MONSTA X

==

COMEBACK: iKON

==

COMEBACK: Ryeowook

==

COMEBACK: WOODZ

==

COMEBACK: Psy

==

COMEBACK: Alice

===

Moon Byul

==

Miyeon

==

VERIVERY

==

Minseo

==

DKB

==

ICHILLIN'

==

YOUNITE

==

Walking After U

===