white scuba dress by Tony Ward – Elilhaam while the open back adds a striking Buy Lipsy White 3D Floral

Sleek and flattering ponte knit shapes this flirty lil' dress that features a subtle sweetheart neckline and a strapless bodice (with hidden no-slip strips and supportive side boning) adorned with an oversized satin bow that covers the front

Shop: Uni Clau Store Sexy 2 Piece Lace Dress ($40) Sara Bellum From "The Powerpuff Girls" Keep it chic with a red pencil skirt and matching top

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If the wedding is being held outdoors, as you mentioned, it is a good idea to wear something warm so you arent freezing, as October can sometimes be chilly