I don't really have a style icon but I really admire the way people dress like Gaga Rihanna and Gwen Stefani. It's good to be inspired by singers who write music and dress incredibly - rather than models and people in the fashion industry who dress immaculately anyway because it's their style.
Design is the method of putting form and content together. Design just as art has multiple definitions there is no single definition. Design can be art. Design can be aesthetics. Design is so simple that's why it is so complicated.