Justin Bieber has become embroiled in a naked picture scandal after saucy pictures of the star emerged online.

In the snaps, the troubled teenage singer is seen standing in a hallway completely nude with just a guitar to preserve his modesty.

Another snap shows the naked singer from behind with guitar held in front of him.

The pictures have been published on TMZ.com and the website's editors report they were taken at the home of Bieber's grandmother in Toronto, Canada in October, 2012.

Sources suggest the Baby hitmaker was playing a prank on his elderly relative.