Every season has its haul of It bags — the ones that make street-style photographers go crazy and inspire looks of envy from every woman around you. And Spring 2013 is blooming with a dizzying array of colors and shapes, varying from sleek and simple to festooned with appliqués and visual effects. Mulberry's Willow bag, for example, has a minimal shape that nonetheless makes a bright splash in mint green, while Sophia Webster's Azealia Striped Python Clutch explodes with a variety of candy hues.