CELEBRATE SPRINGPhotographed by Bobby DiMarzoWHITE OUT: A drawstring waistline and eyelet hemline take the shirtdress to a sophisticated new level and hand embroidery and lace create timeless appeal. On Megan: Chloe Eyelet Pineapple Embroidered Eyelet Shirtdress, $1,995. Atlas wide cuff in 18K gold, Tiffany & Co., $13,000. Tiffany T cutout hinged cuff in 18K gold with white ceramic, Tiffany & Co., $8,500. On Kim: Valentino White Lace Butterfly Embroidered Dress, Barneys New York, $3,850.