By InStyle Staff
Jul 11, 2012 @ 11:25 am
WireImage; Landov; Rex USA

Break out the birthday cake: Giorgio Armani turns 78 today! To celebrate the Italian designer's big day, we're taking a look back at his best looks as worn by celebrities like Naomi Watts and Scarlett Johansson, who can't get enough of his sumptuous designs. Click through to the stars in Giorgio Armani looks!

MORE:Armani Privé at Couture Fashion WeekWhy Adele Wore Armani to the GrammysArmani Dresses Italy's Olympic Athletes