Justin Bieber, 19, handed himself in at a Toronto police station where he was mobbed by TV crews, news photographers and screaming teenage fans.
The charge comes a week after he was arrested and charged for a separate incident in Florida for driving under the influence of alcohol and drugs.
A lawyer for Justin Bieber said his client was innocent.
Toronto police say that Justin Bieber was one of six people picked up by a limousine outside a nightclub in the early hours of December 30.
“While driving the group to a hotel, an altercation occurred between one of the passengers and the driver of the limousine,” a police statement said.
“In the course of the altercation, a man struck the limousine driver on the back of the head several times.
“The driver stopped the limousine, exited the vehicle and called police. The man who struck him left the scene before police arrived.”
After surrendering to police on Wednesday, Justin Bieber was charged with one count of assault and is scheduled to appear in court in Toronto on March 10.
Howard Weitzman, Justin Bieber’s lawyer in California, said the entertainer was innocent and that he expected the case to be treated as a summary offence, which is the equivalent of a misdemeanor in the US.
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