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She knows how to paint the town red!

Rihanna and British model Cara Delevingne as the two ladies hit up a late night party at The Box nightclub in London, England on Saturday night.

The ladies, who were also joined by RiRi's BFF Melissa Forde, went out to celebrate after the successful debut of her new River Island clothing line during fashion week.

Unfortunately for the 24-year-old entertainer and entrepreneur, the night hit a major speed bump as she was allegedly assaulted by an irate London man upset over her reunion with much maligned singer Chris Brown.

According to the NY Daily News, an eyewitness claimed to have seen a man yelling disapproving remarks to Rihanna about reuniting with Brown and threw a bottle of Lucozade, a British soft drink. The Pour It Up singer then fell and cut her knee on a metal object in the midst of the ruckus.

Luckily it was only a little cut for Ri!