Complex sentence: The song was a moderate success in some countries as it peaked at number twelve on the UK Singles Chart, and charted at number sixty-nine in her native Australia, making it her least successful single on the Australian charts to date.
Split into simpler sentences: The song was a moderate success in some countries, reaching a peak of twelve on the UK Singles Chart. It peaked at number sixty-nine in her native Australia, making it her least successful single on the Australian charts to date.