Mag Swag: Justin Bieber Flexes for ‘Men’s Health’ [Photos]

Justin Bieber just turned 21 and he wants us to know he’s not a little boy anymore.
The singer flexed his abs on the cover of Men’s Heath magazine’s April ‘Reinvention’ issue.
In the mag, you see Justin get his workout on while dishing about women, being able to beat up bullies despite his small frame, and how being a ‘perfectionist’ allows him to relate to Michael Jackson.
Check out more photos from the spread below & head on over to Men’s Health to read the interview.