 In June 2007 , Powderfinger and Silverchair announced their combined Across the Great Divide Tour , which promoted Reconciliation Australia , a foundation helping to improve the welfare of the Indigenous people of Australia , and to " show [ that ] both bands are behind the idea of reconciliation " . Reconciliation Australia increased the awareness of the 17 @-@ year difference in life expectancy between the Indigenous and non @-@ Indigenous children of Australia . In October that year , during Breast Cancer Awareness Month , Powderfinger performed another concert on the steps of the Sydney Opera House . This concert was for invitees only – breast cancer patients , survivors and their families were eligible to attend . Powderfinger performed alongside Silverchair , Missy Higgins , and other artists to an audience of 700 . The concert was filmed and later broadcast as a MAX Session on Foxtel channel MAX on 3 November . 
