Justin Bieber is much more than a Twitter phenomenon and the most-copied hairstyle since Jennifer Aniston. He's also a living, breathing, 16-year-old human being who will perform at Toyota Center Saturday night.
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From what we can tell, tickets are still available, but we expect a full house. Rocks Off is no mind-reader, but there are probably as many reasons people are going to see Bieber as there are people going to see Bieber.
But perhaps not. See a few of our best guesses after the jump.