Dec. 4, 2002. A long, slim silhouette with a ruffle detail will make you the belle of the ball. Dress by Escada ($2,600). At Auer's, 210 St. Paul St. Chaillot white necklace with diamond tassels ($3,500) and white-gold pave diamond bracelet ($17,000). At Gnat. Feather hat by Mary Ehrin...