Justin Bieber -- Check Out My Little Boy Muscles

Still looking half his age, a permanently pubescent 19-year-old Justin Bieber misplaced his shirt in a crowd of people recently.Hard to believe in 2 years he'll be able to buy his first real six-pack ... in America.

Source: http://www.tmz.com/2013/07/02/justin-bieber-shirtless-photo/

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