No one is having a better week than Rihanna. She shut down NYFW with a super private Savage x Fenty show (streaming on Amazon later this month) and less than 24 hours later, hosted her fifth annual Diamond Ball benefitting the Clara Lionel Foundation. So what do you wear when the red carpet queen herself invites you to her gala? Allow RiRi’s celeb pals to show you how it’s done. Here are all the looks from the fifth annual Diamond Ball.