Justin Bieber shows off his ripped sexy body as he poses shirtless with his personal trainer

Justin has been working hard to take his body from scrawny to muscular.

So to show off the progress of his training regime, Justin Bieber delighted fans worldwide when he went shirtless and posted a cheeky selfie on Instagram on Wednesday.

The 19-year-old displayed his impressive biceps and defined six pack in the image, which he shared alongside the caption: ‘Me and my trainer’.

And Bieber’s millions of followers were quick to comment on the buff shot, with many complimenting the singer on his new look.