Credit: Getty Photo: Justin Bieber at the AMAs on November 20, 2011

Now that Justin Bieber and Selena Gomez have put that whole paternity nonsense behind them, they can finally move on to a new level of maturity. After all, when a 17-year-old guy is hooking up with a 19-year-old girl, he better maintain the ability to look just as manly as those 20-somethings with their eyes on her — even if he is the world’s most famous singer.

Judging from the Biebs’ appearance on the American Music Awards red carpet, his efforts are showing. He wore a tux, and put his arm around his girl Selena, who was showing much  more skin than usual. Unfortunately, we don’t beliebe he actually fit into this suit very well. And that uptown, gelled-out combover made him look a little femme.

But! Justin seems to be trying another route towards manhood: growing his very first grown-up mustache. We looked closely at a few photographs of him last night, and it looks like he’s on to something, however sparse that something may be.

What do you think? Would the Biebs look hot or not with a mustache? Do you think his would come in less like Borat’s, and more like Dancing With the Stars pro Derek Hough’s polished peach fuzz?

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