Embroidered tulle plunging- neckline sheath gown with Chantilly-lace lingerie slip by Monique Lhuillier, $7,350 at 19 E. 71st St.; 212-683-3332. Diamond drop earrings set in platinum by Tiffany & Co., $190,000 at tiffany.com. Marquise champagne diamond ring with white-diamond trillions and set in yellow gold by Anna Sheffield, $22,000 at 47 Orchard St.; 212-925-7010. White leather sandals by Jimmy Choo, $925 at jimmychoo.com. Bouquet by L’Atelier Rouge.