7. Add a Belt to Your Little Black Dress Like Elizabeth Olsen.
Elizabeth Olsen attends a 2011 benefit in New York City.
Dimitrios Kambouris/Getty Images
Create waist definition or add a pop of color by adding a belt to your little black dress like Elizabeth Olsen has done. You can add a bright or metallic for contrast; wear a black belt with a black dress to accent your waist in a more subtle way.