Prince William and Kate, the Duke and Duchess of Cambridge. Kate is wearing Alexander McQueen. (Valerie Macon / Associated Press)
Cat Deeley in Christian Dior. (John Sciulli / WireImage)
Elizabeth Banks in Versace. (John Sciulli / WireImage)
Ed Westwick. (John Sciulli / WireImage)
Jennifer Garner in Yves Saint Laurent. (Chris Pizzello / Associated Press)
Mary-Louise Parker in Dolce & Gabbana. (Chris Pizzello / Associated Press)
Elisabeth Moss in J. Mendel. (Chris Pizzello / Associated Press)
Blake Lively in Marchesa. (Chris Pizzello / Associated Press)
Jennifer Lopez in Emilio Pucci. (Chris Pizzello / Associated Press)
Maria Bello in Donna Karan. (Chris Pizzello / Associated Press)
Tom Hanks and Rita Wilson. Wilson is wearing Elie Saab. (Bret Hartman / Associated Press)
Nicole Kidman in Elie Saab haute couture. (Chris Pizzello / Associated Press)
Jack Black and wife Tanya Haden. (Chris Pizzello / Associated Press)
