This time Justin made everyone crack up when he got the scare of his life. In typical Ellen style, she scared him mid-interview, probably making him almost s**t his pants.
He was a good sport, and laughed the whole thing off. Shortly after, he surprised the fan that he prank called on Ellen's show just the week before. She wasn't expecting to meet him, so of course she freaked out when she saw him.
She's not the only one Justin pulled a joke on while visiting his famous pal. They also hid in the studio's bathroom, and scared Ellen's fans. Funniest thing ever.
These aren't the only tricks Ellen and the Biebs have up their sleeves, either. He's going to star on her upcoming show Repeat After Me. Watch all of the hilariousness, below.