A girl in pearls; nothing more sophisticated and elegant without being flashy.
Washington is the quintessential pearl friendly town.
Nothing says you must be boring in your pearls though. My favorite look is draping also mixing and matching both pearl and a little funk.
If you are looking for a truly unique lbd try Polyvore, a fantastic online shopping haven.
Top image, the queen of Washington fashion, Michelle Obama
Middle picture channelling Bedrock itself by; Trifari