Your collarbone is one of your sexiest body parts, so choose a neckline that highlights this area, and don’t reveal too much skin if you want to look classy as well as sexy. Black is an obvious choice,but why not choose something more interesting, but not too trendy, such as a blue? Details like bows and lace are always feminine and the most flattering hemline is on or above the knee. Round it off with a statement clutch and fabulous heels.