(Getty Images)
Justin Bieber is bulking up, and showing off his progress in a series of Instagram photos.
In the pics, the shirtless singer works with different weights and machines that emphasize his bulging biceps, popping veins, chiseled chest, and toned back.
“Back in the gym #dontbescared #orangegymrats,” Bieber captioned the collage.
The teen heartthrob is also seen wearing just a towel in a video posted to Instagram by Scooter Braun.
Check out the photos and clip below!
