In a new interview with Rolling Stone, the 18-year-old pop star says he's all grown up.
"I feel like I carry myself in a more manly way," he explains. "I don't carry myself as a boy."
Of course, that's not to say the Biebs is too mature for a temper tantrum.
Midway through a golf game, he and his entourage were confronted by paparazzi. Per Rolling Stone, J.B. "responds by taking out his nine-iron and hitting a golf ball at them. He later tells an employee at the club that 'we'll probably never play here again.'"
And if Justin's younger fans are turned off by his relationship with girlfriend Selena Gomez, tough luck. Manager Scooter Braun says for some girls the Biebs' romance "kills the dream—but there's also gonna be girls that see him with a girlfriend, hear about the romantic things he does and want him even more."
Good thing he's man enough not to let all the attention get to his head.