Global star Justin Bieber is proud of his abs…

Getting down to the gym is one of those things that most of us mere mortals just can’t find the time for, but Justin Bieber, 20, has been a slave to his abs.

Taking to Instagram, the singer said,

‘#ogr what a solid core . Lol #stayfit #dontbescared’

after posting a candid picture of himself using a dip bar.

The tag was for his personal trainer Patrick Nilsson who has helped turn Biebs into a rock hard pop star.

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With a look of slight pain, Biebs wears a trademark hat, as well as neon green high-top trainers, a pair of baggy shorts and white vest Tee.