As a woman grows up and her wardrobe grows with her, it’s essential that she have a few key pieces at the ready for special occasions. The most versatile of these is cocktail attire — mainly a cocktail dress — that can be worn for everything from weddings to class reunions to holiday and New Year’s Eve parties. You want an outfit that says chic yet sophisticated. Luckily, we’ve got you covered. Look no further than these celebrity-approved party dresses.