For Asia, I would say Singaporehttp://hubpages.com/hub/Shopping-Singapore-Marina-http://hubpages.com/hub/Shopping-Singapore-Orchardhttp://hubpages.com/hub/Vivocity-Singapores-Familyand Bangkok! hubpages.com/hub/Thailand-4-Days-in-Bang... is not bad too, but generally it will be more expensive. hubpages.com/hub/Shopping-in-Korea.
Paris, Milan, New York. These cities are famous for their fashion shows and shopping.