Justin Bieber shows off his terrifying muscle gain and body transformation in topless weight training picture

Remember when Jodie Marsh turned into a bodybuilder and everyone dropped their sandwiches at their desks in shock?

Well the latest topless picture of Justin Bieber is having a similar effect.

Justin Bieber showed off his shocking body transformation on Twitter. Copyright [Instagram]

The 19-year-old has clearly been hitting the weights and protein powder recently, showing off his scarily-ripped body in his latest Instagram picture.


Posing with his personal trainer, Justin appears to be doing everything he can to tense his muscles for the snap, showing off the results of his hard work.



Looking worlds away from his boyish body in 2010, Justin's toned physique is apparently all for the Beliebers.

He recently admitted: "I have been working out in the gym, getting bigger, trying to get sexy for the ladies."

Justin Bieber looked teeny-tiny before he started his weight training in 2010. Copyright [Splash]

Justin keeps to a strict diet and workout regime, which includes staying away from alcohol and keeping his feet on the ground.

He added: "I know I am not going to make a life-changing bad decision, as some people have. I have seen it happen too many times. I could be my own worst enemy, but I don’t want to mess this up."

An onlooker during Justin's recent holiday saw the star working hard in the gym every morning, admitting he was impressed by Biebs' strength.

He said: "Justin was definitely on a mission to pump up. He was on the treadmill for about 30 minutes working up a sweat and then he went to the free weights to lift.

"It’s funny because he’s pretty small but can pump a lot! He benched 120 pounds for his chest and did about 400 crunches and sit-ups to build his core. He’s in really good shape."

I'm working on my own 6packs too. gQartsAssin say so... lol