Justin Bieber makes fans drool with sexy snap showing off his chiselled physique

Justin Bieber knows how to set pulses racing.
The Sorry singer, 21, shared some seriously sexy snaps to Instagram where he showed off his chiselled chest.

Justin's sculpted torso was on full show and he wore a towel slung low around his waist.
Captioning the pictures "back in the gym," Justin also revealed he had swapped his platinum blonde locks for a purple rinse.