Last night at The Vineyard (a 157-acre enclave located in Beverly Hills), Rihanna held the inaugural ball for her Clara Lionel Foundation, which she founded in 2012 in honor of her grandparents and which works to improve the quality of life for communities globally in the areas of health, education, arts and culture. And the pics: man, they are truly fabulous. RiRi shone bright in a humongous Chopard diamond (or what we're calling the pink Pocahontas necklace) and cerise-colored silk Zac Posen dress, and rumor has it she performed with a live orchestra in front of the 600 guests. Oh, and Brad Pitt introduced her. Into it? You will be — here are the best snaps from the night.