Jason Wu's voluminous frocks and pencil skirts became must-haves for well-heeled women everywhere when Michelle Obama donned his white beaded one shoulder gown to the Inaugural Ball last year. Since then, the 27-year-old designer has been moving in only one direction, up. The 2008 CFDA Vogue Fashion Fund finalist's colorful, optimistic and retro-American sensibility is still central to the newly emerged "First Style." In person, Wu is equally winning. With a mischievous glint in his eye, he is all wit and charm.