The Prelude to the Olympics event at the Fondation Louis Vuitton in Paris was a star-studded affair on July 25, featuring co-hosts Charlize Theron, Serena Williams, Rosalía, and Omar Sy. However, the spotlight was firmly on Rosalía, who stunned everyone with her breathtaking sheer champagne "naked dress" by Dior, paired elegantly with matching high-waisted underwear.