This is not a drill M&S just dropped its coolest ever dress and it's under 50 Marks & Spencer's bestselling polka dot dress could easily be designer but it's under 80 Marks & Spencer Cocktail dress Party dress black Zalando A moment for @tonss__ in the ultimate party dress from our M&S x 16Arlington collection. From the entrance making column silhouette to the hand applied crystal embellishments, every detail speaks to the couture level craftsmanship M&S drops date night dress of summer it's 50, looks designer and selling fast