Marc Jacobs' reputation is that of a rule-breaker. When one of his 2007 runway shows started two hours late, he found himself at the center of a public war of words with some very influential fashion critics. And some of his most memorable designs-a grunge collection he created as head of Perry Ellis in 1992-resulted in his firing from the label. Jacobs now designs for three major labels; two are his own, Marc Jacobs and Marc by Marc Jacobs, and he's also creative director for the French luxury house Louis Vuitton. Rule-breaking aside, critics have hailed Jacobs as one of the most influential fashion designers of his generation.