One source claims the 18-year-old was actually bullied for being there -- apparently not everyone thought she earned the right to walk the shows!
The insider spilled:
Before her birthday month officially came to a close, Rihanna made sure she got one more night of partying in.
Not that she needs her birthday as an excuse to party, though!
The 25-year-old bared a gorgeous, toned leg while leaving Giorgio Baldi restaurant in a black slit dress from her River Island collection, Trapstar leather jacket, and Tom Ford lace-up heels.
And her flowy, wavy weave looked better than ever!
Meanwhile, Chris Brown was idling in his red Lamborghini nearby, waiting to take RiRi home.
Drive safe, you two!
[Image via AKM-GSI.]