STAR TURN: Yes, even celebrities get starstruck. While sitting front row at the Matthew Williamson show on Tuesday afternoon, Rihanna discussed her plans to perform at the Gucci dinner on Wednesday night, which Madonna hosted. "I've never met her before," the singer said of Mrs. Ritchie, before adding: "I hope I don't cry." Seated next to the chanteuse was Joy Bryant — who had changed outfits since attending Monique Lhuillier that morning. "Well, that was at 11 and now it's five," the actress said of her midday wardrobe switch, by way of explanation. And, indeed, Bryant had impending plans to don her third ensemble of the day: at Raoul's, where Cosmopolitan magazine was feting its March cover girl — Rihanna.

LA VIE EN ROSE: Despite the cancellation of Vanity Fair's post-Oscars bash, Tuesday night's Chopard-hosted party for best-actress Oscar nominee Marion Cotillard at Chateau Marmont's Bungalow One reflected the now-upbeat mood in Hollywood due to the reportedly imminent end of the writers' strike. The timing was right; the Motion Picture Academy's official nominees luncheon took place earlier that day at the Beverly Hilton, where actors and directors got to bask in the "everyone's still a winner" glow. Later, Cotillard was joined by fellow nominee Amy Ryan, Ellen Von Unwerth, Erin Fetherston and directors Lawrence Kasdan and Amy Heckerling. As the belle de nuit at the Bungalow, which was decked out in red roses and pink pastries, a Chloé-clad Cotillard sighed, "I'm just having fun. There's beauty in everyone you meet."