It’s been a busy, glitzy month for Lauren Sánchez. Still revelling in the experience of space, she held her bachelorette in Paris with friends including Kim Kardashian and Katy Perry, then jetted on down to enjoy Cannes Film Festival with Eva Longoria. Last night, she reunited on the red carpet with husband-to-be Jeff Bezos, for the annual amfAR Gala.

The glamorous affair at the Hôtel du Cap-Eden-Roc saw Sánchez shimmy into a mermaid-esque, sequinned Roberto Cavalli strapless gown. The blue, silver, and lavender sparkly dress featured a corseted waist and sweetheart neckline—a silhouette and style straight from the Lauren Sánchez school of style—and delicate silver stilettos that flashed her pale pink pedicure. She accessorized with solid, oblong silver earrings and a silver clutch bag—and of course, her rock of an engagement ring. Bezos, meanwhile, wore a classic black tuxedo.