Canadian musician Hassan Ali – who performs under the stage name Top5 – was stabbed in the leg by a gang that surrounded his car after the North London gig.
Shocking footage shows the group climbing on the white Mercedes and stamping on the windscreen.
Roughly a dozen men are seen trampling on the vehicle before about three, dressed in white t-shirts, begin mercilessly kicking the driver.
A vehicle parked next to the Mercedes also appears to take a beating with many jumping on the car to watch the chaos unfold.
After several minutes, the Mercedes driver is seen making a swift getaway with a cracked windscreen and the boot still open.
Earlier, victim Top5 posted clips of himself to Instagram watching Drake’s Wireless Festival set from a VIP section near the stage.
The rapper – cleared last year of a murder charge in his native Toronto – is said to have angered rap rivals in the capita after telling fans in a social media live stream: “There is no real killers in London.”
The Metropolitan Police said officers were called at around 12.15am today to reports of a stabbing in Springpark Drive, near Finsbury Park.
A spokesman added: “The victim, a man in his 20s was approached by a group who damaged his car before stabbing him in the leg. He was taken to hospital and his injuries are not believed to be life-changing.
