Chris Brown bans his friends from driving his cars after $500k Lamborghini crash

Chris Brown has put a halt to his friends driving his cars after one of them totaled his insanely expensive Lamborghini Aventador.

According to TMZ the star was furious after the crash.the driver left the scene, so cops don't know who was behind the wheel.

The "friend" told Chris he was not under the influence ... he just lost control. Unclear if Chris is buyin' that.

Chris had given 7 friends permission to drive his fleet of cars -- but after the accident he told all of them to hand in the keys