Lil Twist was driving Justin Bieber's car while under the influence of marijuana ... and he even had a LIT BLUNT in the car at the time of his DUI arrest, law enforcement sources tell TMZ.
We broke the story ... 20-year-old Twist was busted in Calabasas around 3:30 AM Thursday morning on his way to Bieber's house.
Twist was hauled to a nearby station, where he was booked ... and was later released after roughly 8 hours in custody.
As he left the Sheriff's station, Twist didn't have much to say to us. We're guessing he'll be more talkative when he explains himself to JB.
Lil Twist's DUI Arrest
7/11/2013 2:09 PM PDT BY TMZ STAFF
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