Justin Bieber displays impressive biceps and defined 6-pack on Twitter

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'.

Wearing a baseball cap and low-slung shorts, Justin is seen pointing at the man responsible for his new physique - flexing his arm muscles in the process. 


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