Rihanna played hostess with the mostess at The First Annual Diamond Ball in Beverley Hills on Thursday night to honour The Clara Lionel Foundation, a charity she founded in 2012.
All eyes were on the 26-year-old singer in her stunning, strapless Zac Posen gown and OTT Chopard bling as she posed for photos with her A-list guests.
This is how Rihanna does smouldering red carpet glamour andout-dresses Kim Kardashian.
Kim was there to support Rihanna's charity (along with her mum Kris Jenner) in a black all-about-the-reveal Balenciaga ensemble.
Think plunging bodysuit under a slinky sequin crochet dress teamed with black stilettos and a beautiful floor-length satin coat blazer.
Now when we say star-studded we mean Hollywood's finest. Other guests included Brad Pitt, Salma Hayek, Jimmy Kimmel (who played host) and Ellen Pompeo.
"Feel so lucky to have an evening like this, to spend with people with hearts like mine, who want to change and save lives at any cost!" Rihanna tweeted before the event.
"There's so much to do, and I can't do it all by myself, so I have to thank all of the supporters of and people who donated to #TheClaraLionelFoundation Looking forward to seeing you later this evening."
We love seeing RiRi on the red carpet and this glossy, immaculate look was definitely one of her finest.
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LOVE RIHANNA'S STATEMENT STYLE? Take a flick through this gallery to see more stand-out looks from the pop star starting way back when.