Justin Bieber has been charged with assault and dangerous driving after crashing his quad bike into a minivan.
He was arrested near his hometown of Stratford, Ontario, after apparently getting into a fight with the other driver.
Ontario Provincial Police confirmed they were called to the scene to investigate and then made the arrest.
Police said they then released him on what's called a "promise to appear" in court on 29 September.
According to a police statement, an investigation "revealed that after colliding, the driver of the all terrain vehicle and an occupant of the minivan engaged in a physical altercation".
There were no reported injuries from the collision, but law enforcement sources wouldn't say whether injuries had resulted from the fight.
Justin Bieber's lawyer, Brian Greenspan, said in an emailed statement: "Justin Bieber and Selena Gomez' peaceful retreat in Stratford this weekend was unfortunately disrupted by the unwelcome presence of paparazzi.
"This has regrettably resulted in charges of dangerous driving and assault."
This is the latest in a long line of run-ins with the police.
Bieber is serving two years probation for throwing eggs at his neighbour's house in LA.
The star, 20, already faces an assault charge in Toronto following an altercation between a limo driver and a passenger last December and is expected in court next Monday to answer that charge.