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Justin Bieber pulled a fast one on fans over the weekend when he posted a photo of his bare behind to Instagram.

According to Zap2It, the photo, in which the 18-year-old pop star poses before a Justin Bieber Live poster, was quickly taken down after it was liked by about 86,000 fans.

Bieber’s manager, Scooter Braun, later explained the situation on Twitter, writing, “As a prankster u have to respect another good prank. Only makes sense.”

To which Bieber replied, “Haha.”

Meanwhile, Bieber’s mother, Pattie Mallette, is working hard on a much more serious matter: She’s executive producing a pro-life short film Crescendo, aimed to “encourage young women all over the world, just like me, to let them know that there is a place to go, people who will take care of you and a safe home to live in if you are pregnant and think you have nowhere else to turn.”

The film be shown in 100 locations on Feb. 28, according to Billboard.

What do you think of Bieber’s full reveal? Did he go to far? Sound off, below.