According to reports, her on-again beau, Chris Brown was also at the nightclub, but the couple went to great lengths not to be photographed together.
Rihanna, who was wearing sunglasses, was out with friends celebrating her 21st birthday, which was on February 20th.
She hung out on a private patio with pals and was sent a bottle of Armand de Brignac champagne and "a pink cupcake tower that featured a flower that lit up like a sparkler."
According to partygoers, Rihanna appeared to be "having a good time and laughing."
The paps happened to catch a quick glimpse of her outside the nightclub right before her driver sped off, check out the video below!