Last night Justin Bieber posted a picture of a private body part on his very public Instagram. Of course the picture has since been taking down, but not before we nabbed the pic! Scooter Braun, Justin’s manager, took to his personal Twitter account to say that Justin is just a prankster and that’s why he posted the picture. First weed smoking and now this? Clearly, Justin is slowly breaking out of his “Baby” aged-shell and moving on to more adult things! Check out the pic in the gallery! Julie A.