Check out Justin Bieber looking buff!
The Canadian singer, who is currently on tour, looks like he’s been beefing up.
Posting a topless snap of himself on his Twitter page, the 18-year-old seems to have been putting on a bit of muscle.
Tweeting ‘Me and @nickdemoura dance rehearsal get ready #watchout’, the heartthrob took centre stage in front of the mirror.
With his tracksuit bottoms slung across his hips and the tops of his boxers on show, we can almost hear girls screaming across the world!