Delta’s first album, Innocent Eyes, was one of the highest-selling debut albums in Australian history. The album spent a record-breaking 29 weeks at #1 in Australia. It topped the Australian Albums Charts and reached 23x platinum in sales. Delta became the first-ever artist to have five #1 singles on the Australian charts from a debut album and was awarded the ARIA Albums Artist of the Decade in 2010 having sold more albums and singles than any other domestic or international artist over the decade.
Her last album Wings of the Wild debuted at #1 with the platinum hit song "Wings", the singer’s 9th #1 single. The album’s accompanying sold out arena tour broke records as Delta became the highest-selling female Australian touring artist in 2016 and the tour’s live concert DVD earned a #1 on the ARIA Charts.
In January 2020, Delta was inspired to write “Let It Rain” after seeing the devastation from the bushfires across Australia. All proceeds went to aid with Red Cross bushfire relief.
Delta released “Keep Climbing” in May 2020. The much-anticipated song is about resilience and never giving up.