formal elegant dress Chic Backless Black Evening Dresses V-neck Appliques Dresses with Slit It is adorned with intricate beadwork and shimmering embellishments that add subtle glamour Chic Half Sleeves Deep V-neck

Sold exclusively at PromGirl, this fabulous long neon gown has sequin patterns that sparkle from the one-shoulder bodice to the hemline of the floor-length skirt for a gorgeous look at prom, fancy galas, and other black-tie formals

This plain cap toe Oxford is perfectly suited for the most formal of occasions, pairing excellently with a tuxedo

My health-ified version swaps out the sour cream for high-protein greek yogurt, adds a big ol handful of baby spinach, and uses parmesan instead of anchovies so its vegetarian-friendly

RELATED: Duo Costume Ideas for You and Your BFF You could honestly DIY this costume yourself by wearing a button down, shirt and pants combo you already own and inventing in the mask and machete, but if you really want to go for authenticity look no further than this Jason look from Friday the 13th

A Trouser Suit Finally, a trouser suit, which can absolutely hit the wedding scene as long as it's suitably jazzy itself COS' sumptuous velvet take is right on the money or nudged in the festive direction courtesy of crystallised flats or bauble earrings