A Master Class On The Formal Gown

From Marilyn Monroe to Audrey Hepburn, Salvatore Ferragamo's always boasted a significant celebrity fan base. But, never have so many starlets supported the designer all at once than this past Thursday at the Inaugural Gala for the Wallis Annenberg Center for the Performing Arts in Beverly Hills.
Ferragamo sponsored the event, at which everyone from Gwen Stefani to Nicole Richie to Charlize Theron appeared on the red carpet in gorgeous floor-length gowns. Perhaps, all of Hollywood drank the same magical potion, but thanks to some unknown, powerful force, everyone showed up looking really, ridiculously good. Ahead, we pick our top four best dressed of the night — plus, black-tie tips to learn from each.