Much as i miss the amazing fashion and shops in England, i had to adapt and find out the best australian clothes shops. My favourite at the moment is Sportsgirl - a mid to expensive price range store, offering gorgeous clothes and accessories. The sales are amazing, and i have found many a diamond in their sale racks.
As beautiful as their clothes are, i find them too expensive for regular purchase, so generally head straight to the accessories department when visiting. They are great for a small, cheap fix but look much more.