Cover: Dolce & Gabbana silk dress, $6,495, and bra, $275. Select Dolce & Gabbana stores. Marc Jacobs silk dress, $695. Marc Jacobs stores. Altuzarra silk cardigan, $695. Neiman Marcus stores. Cover Look, page 34: Hilfiger Collection bikini, $290. Tommy Hilfiger, N.Y.C. 212-223-1824. Altuzarra cardigan, price available upon request. Altuzarra.com. Fashion Expert, page 82: Erdem silk organza dress, $13,250. Saks Fifth Avenue stores. Erdem leather shoes, price available upon request for similar styles. Erdem.com. Super Powers, page 175: Gucci silk dress, $3,500. Select Gucci stores. Fresh Faces, page 179: Marc Jacobs silk dress, $695. Marc Jacobs stores. Altuzarra silk cardigan, $695. Neiman Marcus stores. Page 180: Chloé viscose-and-silk top, price available upon request. Chloé stores. J Brand denim shorts, $154. Jbrandjeans.com. Page 183: Isabel Marant cotton dress, $875. Isabel Marant, San…