Best dressed of the week Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge prepare to board the royal barge 'Spiri...

Best dressed of the week

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge prepare to board the royal barge 'Spirit of Chartwell' during the Thames Diamond Jubilee Pageant on June 3, 2012 in London. The Duchess wore an Alexander McQueen dress, the same designer as her wedding gown. (Photo by John Stillwell - WPA Pool/Getty Images)

Actress Mischa Barton smiles in the parade ring before The Derby on June 2, 2012 in Epsom, England. (Photo by Peter Macdiarmid/Getty Images)

Jessica Alba arrives at a replica of a Monte Carlo street wearing Narciso Rodriguez, before a launch ceremony of Montblanc's new Princesse Grace de Monaco jewellery collection inside the Mont Blanc concept store in Beijing June 1, 2012. REUTERS/Petar Kujundzic

Eva Longoria attends Glamour Women of the Year Awards 2012 at Berkeley Square Gardens wearing Victoria Beckham, on May 29, 2012 in London, England. (Photo by Stuart Wilson/Getty Images)

Emelia Fox attends the private VIP view of Royal Academy Summer Exhibition 2012 wearing Luisa Beccaria, at Royal Academy of Arts on May 30, 2012 in London, England. (Photo by Tim Whitby/Getty Images)

Kristen Stewart steps out wearing Stella McCartney at a screening of 'Snow White and The Huntsman' at Westwood Village in Los Angeles on May 29, 2012 -- Getty Premium

Lily Collins attends Glamour Women of the Year Awards 2012 in Alexander McQueen, at Berkeley Square Gardens on May 29, 2012 in London, England. (Photo by Stuart Wilson/Getty Images)

Our favorite red carpet style moment's from the week.