Phillip Lim asked himself one question when designing Resort: "Would Bianca wear this?" That's Ms. Jagger, of course, and her part-tailored, part-louche influence could be detected in everything from a beige gabardine double-breasted suit to cropped silk kimonos (or "kiminis," as Lim dubbed them) to exotic gold collar necklaces. A draped silk cowhide-patterned dress offered a fresh take on an animal print, and a mint-green leather romper was equal parts tough and sweet.

"I considered how every piece would fit into a girl's life," the designer said. While a chinoiserie-style jumpsuit in sea foam silk has limited real-world potential—unless your schedule includes frequent jaunts to the Riviera, à la Jagger in the seventies—other pieces show Lim's understanding of his customers' fast-paced twenty-first-century lives. Case in point: an off-white blazer with removable leather cuffs and bomberlike lapel detail. Call it three looks for the price of one.