Rihanna was the life of the party Wednesday night (April 18) in Beverly Hills, Calif., where she performed for a room of the entertainment industry's elite at the 15th Annual "An Unforgettable Evening." The event was held to benefit EIF's Women's Cancer Research Fund.

Inside the Beverly Hilton Hotel, the 24-year-old "Where Have You Been" songstress, donning a navy-and-beige-striped top with a high-slit dress, moved from the stage to the crowd, where the likes of director Steven Spielberg, who serves as EIF's Honorary Chair, were rocking out to her vocals. Singer Sheryl Crow was also in attendance to watch Rihanna, who was just named one of Time magazine's 100 Most Influential People in the World.

See Photos of Rihanna Perform at a Benefit for EIF's Women's Cancer Research Fund


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