Rapper Lil Twist is becoming a little pain in the butt with his umpteen run-ins with police. The Young Money artist was arrested for DUI in Justin Bieber's luxury whip.

According to TMZ, Biebs' BFF was arrested for DUI in Calabasas, Calif., early Thursday morning (July 11) while driving JB's famous chromed-out Fishker Karma vehicle.

Police say they stopped Twist for speeding at 3:30AM and when they approached the car, he appeared to be under the influence of something, but wasn't drunk.

The 20-year-old rapper was then arrested and booked for DUI.

This isn't the first time Twist has gotten in trouble while driving Bieber's expensive car.

In March, he reportedly crashed the sports car, although, it looks like he didn't do any real damage to the vehicle. Before that, in January, Twist was pulled over by police in Bieber's white Ferrari and a paparazzo was killed trying to snap a photo.

We know that Twist and Biebs are good friends, but this is getting out of hand. Lil Twist needs to chill out and drive his own car.