Canadian teenage star Justin Bieber is set to star in a future CBS episode of 'CSI: Crime Scene Investigation'.

The 16-year-old heartthrob is to play "a troubled teen who is faced with a terrible decision regarding his only brother".

The episode - which is the first in the forthcoming eleventh season of the American crime drama show - will air on September 23.

The singer's also addressed worries over his voice breaking any day now by getting advice from his mentor Usher. The 'OMG' star's been guiding Bieber during puberty, so that his changing voice doesn't affect his career.