If you want something unique, formal, but with 1960's diva touch, then I highly recommend you to try on this elegant chignon hairstyle that can be used for formal occasions, including weekend formal brunches, prom nights and weddings. Don't be afraid of word "chignon," it's just a whimsy French term for bun. I think there is nothing more romantic than this voluminous, classy look. What I love about this updo, then it's the sophisticated touch that makes you look ultra formal. The chignon will never go out of style.