The 20-year-old singer was alleged to have assaulted a limousine driver in the early hours of December 30 but the charge was withdrawn in a Toronto court today after prosecutors said there was "no reasonable prospect of conviction".
The Never Say Never hitmaker was said to be "relieved" following the verdict and is ready to get on with his "busy career".
Police alleged Bieber was one of six people who got in the limo in the early hours of December 30, and there was an altercation while on the way to a hotel where one passenger hit the driver in the back of the head a number of times before running away.
Bieber's lawyer Brian Greenspan had always insisted he was innocent and is said to have contacted the pop star last week to say he expected the charges to be dropped.
This comes after Toronto mayor Rob Ford - who last year admitted to smoking crack cocaine - shot to Bieber's defence following the charge.
Speaking in January on Canadian radio, he said: "Well, you know what, he's a young guy. At 19 years old, I wish I was as successful as he was. He's 19 years old, guys. Think back to when you were 19."
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