(2 of 10) Best Dressed Party GirlsThe holidays are here, which means office parties, cocktail hours, and other merry-making are bound to fill up your social calendar. To help make festivities all the more fun, we’ve outlined the 10 best party dresses for every shape and style. Beyoncé The Long-Limbed Beauty: Flaunt those lean, shapely legs in a flirty A-line dress. Versions with bright '60s patterns and embellishments, like Beyoncé’s Milly frock, eliminate the need for any other accessories. Milly Kaleidoscope Dress, $243.