Last night, Rihanna hosted the inaugural Diamond Ball, a black tie fundraiser to benefit her very own charitable organization, the Clara Lionel Foundation. As the host and belle of the ball, Rihanna was the picture of old-Hollywood glamour. In between costume changes that included a mauve and black floor-length gown from Zac Posen, Rihanna kept a solid rotation of diamond encrusted gems from Chopard and Repossi all night long. Headlining the evening, she ran through her canon of hits: from an orchestral version of "Pour It Up" all the way back to "Umbrella." Check out pictures of Rihanna's glamorous get-up, 24-karat stunners, and the return of the #BrrRihanna grey ponytail.
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