To say that Isaac Mizrahi has revitalized Liz Claiborne would be an understatement. The majority of you loved his Spring ad, so you'll fall head over heels for his Spring Look Book, too. The first thing it did for me was make me want to play around with color in an urgent way. Also, it made me realize the designer has the unique ability to make preppy and prissy look youthful and cool. Spring is a more lively season thanks to Isaac!