"You know who is the best who ever did it? Princess Diana. She was like, she killed it. Every look was right. She was gangsta with her clothes," she told the mag.
This isn't the first time she's been linked to Diana, with American feminist writer Camille Paglia recently comparing the two women.
"Rihanna is in love with the camera, and the camera is in love with her. Not since Diana rocketed from a shy, plump kindergarten aide to a lean, mean fashion machine has there been such a ravishingly seductive flirtation with the world press," she said earlier this year.
But it's not just Lady Di, who RiRi admires. She also sang Nicole Richie's praises, saying: "Oh my God, are you kidding me? Nicole Richie. She just pisses me off, she's so good." We guess that's a compliment.