"20,000 euros. All you have to do is walk at a charity fashion as me, Princess Charlotte Delacourt." When my sister badgered me into going to Paris, I was fine with carrying her bags and pretending to enjoy the sights and sounds of the city. Little did I know, the trip that she had planned all her life would drastically change mine, with a bonus of chefs, chauffeurs, chambermaids, royal treatment, gowns, jewelry, the highest of...