retro blue dress Fiona Cotton Midi Dress. Simple Womenswear Daily-Vintage Inspired Fashion, Gray / S Color White Neckline V Blue 1940s Solid Short Sleeves

Watson, 20, took a turn from her usual sophisticated looks and wore this sassy and sexy Rafael Lopez dress (around $5,000) which featured a sheer black lace top and feathered trim

The enchanting sweetheart neckline frames the exquisitely embroidered bodice, while a full, textured A-line skirt flows gracefully with cascading floral appliqus that drift down to the hem

"In our evaluations, the adhesive really does stay secure, even after hours of dancing," says Seymour

With a sheer embellished bodice that wraps around to the back of this gorgeous long formal dress, matching beaded-lace applique tops the side drape that flows from the waist to the floor for a dramatic look at prom, galas, and other black-tie events

Go from day to night with the Regine maxi dress