Justin Bieber wants you to stay safe behind the wheel.
Rule No. 1 is put down your phone. And if you can't, the Biebs will put it down for you.
"There are too many lives lost to such a preventable issue like texting and driving," the pop star told E! News at a campaign for Drive Safe, a free app that locks a smartphone's keyboard when it's in a vehicle going more than 10 miles per hour.
"This campaign isn't antitexting," Bieber assured us. "It's about texting responsibly."
An important cause indeed, but what made the Twitter-loving teen get on board?