Lauren Sánchez has had a dazzling month. Fresh from her space adventure, she celebrated her bachelorette party in Paris with friends like Kim Kardashian and Katy Perry before heading to the Cannes Film Festival with Eva Longoria. Last night, she stepped back onto the red carpet with her fiancé, Jeff Bezos, for the annual amfAR Gala.

The glamorous event at the Hôtel du Cap-Eden-Roc saw Sánchez in a show-stopping sequined Roberto Cavalli gown—a mermaid-style strapless dress in shimmering blue, silver, and lavender with a corseted waist and sweetheart neckline, perfectly in line with her signature style. She paired it with delicate silver stilettos that showed off her pale pink pedicure, along with sleek silver earrings, a matching clutch, and, of course, her massive engagement ring. Bezos kept it classic in a black tuxedo.

Inside, the couple posed together and mingled with guests, including their friend Heidi Klum.

Earlier in the week, Sánchez attended the Global Gift Gala with Longoria, where she received the Women Empowerment Award for her philanthropic work with the Bezos Earth Fund and This Is About Humanity. True to form, she wore another strapless sweetheart-neckline gown—this time a custom crystal-embroidered design by Dolce & Gabbana.

Proof that couples who gala together, stay together.

(Photos: Getty Images)