The Insider.com

Gone are the days of a boyish Justin Bieber dancing in a bowling alley to Baby -- according to the Biebs himself, he's a man now.

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"I feel like I carry myself in a more manly way," the now legal superstar tells the new Rolling Stone, out Friday. "I don't carry myself as a boy."

His mentor Usher agrees, and attributes it to the fact that he was raised by a single mother.

"He's more mature than the average child -- or rather, young man," he tells the magazine.

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But his recent actions tend to differ. From his well-publicized paparazzi tantrums to the now infamous GQ article where he actually says,"I'm 18 years old and I'm a swaggy adult! Come on, swaggy bros!" (seriously), it would seem that he still has a bit of growing up to do -- which surprisingly, his loyal manager Scooter Braun doesn't disagree with.

"On one side he's probably the most mature and aware teenager on the planet," he says. "And on the other side he's a like kid -- like, literally, a kid."

Braun also comments on his puppy love relationship with Selena Gomez, which he claims is not as detrimental to his tween-centered fan base as people might think.

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"Yes, there's gonna be some girls that if they see him with a girlfriend, it kills the dream," he tells Rolling Stone, "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. I have 30-year-old female friends who heard about that and said, 'Justin Bieber is the most romantic dude on the planet. I'm in love with this boy.'"

Sure, he's legal now but .... anyone else a little uncomfortable with that quote?