Triple j Unearthed is a great source to find new & interesting Australian music. That is how I discovered Dollarosa. Their sound could maybe be described as some kind of mix alternative rock and emo with some heavier elements too. Based on their EP "The Neverending Unfamiliar" this band has the potential to hit it big, especially if they keep on making hyper-catchy and radio-friendly songs such as "Curses" which has been on repeat for me ever since I heard it.
Unearthed page (with a couple of freebies): http://www.triplejunearthed.com/Artists/View.aspx?artistid=58865