She won't rule out returning to Australia for an 80th or even 90th birthday tour: "You never know."
She attended a Parliament House reception Thursday and later bowed to the House of Representatives to the applause of Australian lawmakers.
Her 11-concert tour will end in her native New Zealand in early June. She has eased her work commitments these days but regards the longevity of her career as her greatest success.
"I think living and being healthy and doing all the things I want to do, I think that's a highlight in itself."