Tolong jelaskan mengenai Babak-babak dari Australian Idol

Audisi dilakukan dibeberapa kota besa di Australia, seperti Adelaide, Albury/Wodonga, Alice Springs, Brisbane, Bunbury, Canberra, Coffs Harbour, Darwin, Dubbo, Hobart, Kalgoorlie, Launceston, Melbourne, Mildura, Newcastle, Perth, Rockhampton, Sydney, Wollongong and Wagga Wagga.