Justin Bieber's 3-D movie: 'Step Up 3-D's' Jon Chu to direct

It's not enough for Justin Bieber to dominate the pop music industry and write a book -- the teen sensation has a larger-than-life 3-D movie in the works, too. To announce his director, Bieber combined the two forces that catapulted his career into the stratosphere: YouTube and Twitter.

"I've been wondering, why's this guy following me around?" Bieber jokes in the video (which helpfully has his twitter handle in the corner, as if any of us could forget) before introducing director John Chu to his legions of loyal Biebettes.