AceShowbiz -

Justin Bieber pulls his pants down, literally. The 18-year-old Canadian singer posts a picture of himself from behind as he's lowering his pants to show off his backside. Wearing a black tank top, a backward hat and black shades, he gives a glance at the camera over his shoulder.

Bieber uploads his revealing photo on Instagram and later deletes it. He says nothing as the pic makes its round on the internet, but his manager Scooter Braun speaks on his behalf, "as a prankster u have to respect another good prank. only makes sense. #crackdealer." The star seems to agree as replying, "Haha."

The picture of Bieber mooning his online fans comes hot on heels of controversies surrounding the leak of photos that show him smoking what is believed as a blunt during a small closed gathering inside his hotel room with a group of friends including young rapper Lil Twist.

But Bieber is not the only one who shows off such antics. Last year when Justin Timberlake went on a trip with his pals in Cabo, San Lucas for a bachelor party ahead of his wedding with Jessica Biel, the former boybander and his group flashed their naked bums to the paparazzi who stalked them.