PHOTOS: Justin Bieber's new adult colouring book is basically PORN

Justin Bieber posted a pic of his adult colouring book on Instagram... and you guys, it's basically PORN.

He said the pic took him a grand total of 30 minutes to finish colouring.

"I actually sat down for 30 min and finished I never can sit down for that long so it's an accomplishment, yes this took me 30 minutes haha I know I suck Don't judge me."

See the pic below:

I colored this 39🔥 its dope Cuz I actually sat down for 30 min and finished I never can sit still for that long so it's an accomplishment, yes this took me 30 minutes haha I know I suck Don't judge me

A photo posted by Justin Bieber (@justinbieber) on Apr 13, 2016 at 10:01am PDT

[Photos: Getty/Instagram]