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Pop wonderkid (or should that be former pop wonderkid?) Justin Bieber has turned 18, and he wants to show the world he's now a man. A man that sounds scarily like Justin Timberlake.

The release of his latest single, 'Boyfriend,' has the hallmark Bieber release signs: Twitter broke and iTunes went into meltdown. But that's about it. The song is a distinctly new sound for The Biebs. There's spoken word, there's falsetto, and there's some slick R 'n B beats from co-writer Mike 'Cooler Than Me' Posner. If he was aiming for a more adult sound, he's found it.

We're not saying that the Biebs new sound isn't infectious or sellable, but it does sound eerily like Justin Timberlake -- 'Cry Me a River' anyone?

Justin Bieber, bloody and bruised for Complex Magazine. Credit: Complex

Despite this, given The Biebs' hordes of fans wouldn't remember the incarnation of JT in which he was a singer (yes, once upon a time he brought 'Sexy Back'), the prince of pop isn't likely to have fallen too far from his throne at the top of the charts.

And returning to the theme of impending adulthood, JB recently told USA Today that he sees his new album, 'Believe,' as an opportunity to show off a more mature side of himself to fans. "I'm maturing, and my music's maturing, so I wanted to do something different," he said.

The Biebs' controversial cover of 'Complex' magazine, which saw him getting belted around a boxing ring (fake blood included), also put him in the realm of Being a Man.

We don't mind the track, so we're giving it a 7 out of 10 for the ability to stick the words "fondue set" and "here comes the falsetto" in a song.

Rate it or hate it (listen to the track below)?

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