Justin Bieber Pranks the 'Ellen' Audience in Full Disguise - Watch Now!

Justin Bieber looked like he had a very good time on The Ellen DeGeneres Show, which aired on Wednesday (November 11), as he got a chance to prank the audience!

As the audience was entering the theater, the 21-year-old entertainer posed as a security guard in costume and had Ellen in his ear telling him what to say to the unsuspecting guests. Too funny!

Later on the show, Justin and Seth Rogen made up after once having a beef on social media.

Click inside to watch Justin come out and surprise Seth…