Justin Bieber Gives Lil Za the Full Moon

Posted Monday January 20, 2014 4:48 PM GMT

He’s no stranger to playing pranks, and Justin Bieber perched his posterior next to buddy Lil Za for a hilarious photo op.

Over the weekend, the “Baby” singer enjoyed a snowboarding trip with some of his pals, and he made sure his fans knew his every move via Instagram.

In one shot, Lil Za looks to be enjoying some shut-eye and Justin took the opportunity to back up next to the recently-arrested rapper and drop trou.

Bieber captioned the picture, @LilZa u a**leep????” To be clear, though it’s logical that Justin was the one doing the mooning, there’s no official confirmation that those are Bieber’s cheeks in the frame.

Photo Credit: Instagram