This one is totally different from "What's Wrong?" as the black and white image features the members looking a little lost, but nevertheless cute in pyjamas, inside a bathroom.

"Dumb & Dumber" is written by B.I and Bobby, composed by Future Bounce and B.I and arranged by Future Bounce.

SEE ALSO: "We will surely come back," iKON hypes up the crowd during their 'Limited Tour - Get Back' in Manila

Their album 'Welcome Back' drops December 24.