Justin Bieber is up and at it again. The Teen sensation had pulled a prank on his grandmother in Canada last October 2012 but the footage has just been received by TMZ.

Justin Bieber, 19 pulled a prank on his grandmother and he did it in the nude. The star had sported a guitar to cover his frontal nudity but left his backside for all to see. He had been singing to his grandmother saying "'I Loooove you grandmaaaa ... how are youuuu ... helloooo grandma. "

The Bieber family was having a blast and his grandmother did seem to find it amusing. She had taken the side of her grandson saying: "It's totally crazy. I feel sorry for Justin all the time because paparazzi pick on him all the time."

The prank was done way back in October 2012, when Bieber decided to serenade his grandmother. He only had a guitar to cover what shouldn't be seen in public and everyone was having loads of fun and his giggling grandmother asked her grandson to go to his room and put on some clothes.

Seems like the photos of Justin's unclothed buttocks was acquired somehow and his tushies are out for his fans to see.

His grandmother had also said regarding the issues that Justin has been in "'He's just a 19 year old boy. And before you criticise him, say, what is my 19-year-old boy doing?'

Bieber is now caught again in another controversy, another nightclub brawl. It was said that Bieber and those he was partying with caused another commotion at a nightclub this time in a brawl with Wayne Rennalls.

According to Rennalls, the pop "brat" had kicked him though footage did not show Bieber involved in the brawl. The fight started when Justin got jealous because the girls he wanted to party with were partying with Wayne.

There are no comments from the Bieber camp, for now, savior the heart the covers his tushies.

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