Justin Bieber has seen and done a lot of things since 2009, when he released his debut album My World and created a pop cultural phenomenon with each toss of his mop. Rolling Stone's latest cover story explores Bieber's position as the reigning man-child of pop, a superstar just barely out of his adolescence who's pulling in a lot of cash for a lot of people. Bieber, who turned 18 a few months ago, told the magazine, "I feel like I carry myself in a more manly way. I don't carry myself as a boy." While Bieber has yet to establish himself as the paragon of masculinity, he's actually on the right track. Though he makes headlines for whipping his chrome Batmobile down California highways and allegedly shoving nosy photographers, he's actually leagues more mature than most full-grown men — none of whom have had to deal with puberty in the public eye.