8:01 AM PT -- There has been a flurry of activity on social media, with people honing in on one of the photos from the gala, along with an interview last night, suggesting she's pregnant. Sources with direct knowledge say sorry, she's not pregnant.
Rihanna shined bright like a diamond at her annual gala -- the brightest in the room -- and that's saying a lot considering the shindig hosted TONS of other celebs.
Riri threw her 5th annual Diamond Ball Thursday night in NYC. The soiree benefits the Clara Lionel Foundation ... it's the name of her grandparents. The org helps impoverished communities around the world with funding for education and health.