After the success of the hit I Am Woman, she went on to have three number one hits and another dozen songs in the US top 40, and was regarded as the queen of 1970s pop.
Her other iconic tracks include Delta Dawn, Angie Baby, Leave Me Alone (Ruby Red Dress) and Ain’t No Way To Treat A Lady.
Fans left emotional tributes. One wrote: “Oh dear, Helen Reddy has died. What is it with this month that so many iconic trailblazing women have passed away? I loved Helen’s voice and many of her songs and…..of course….the anthem for which she was famous. Condolences to her family.”
Another said: “Ruth Bader Ginsburg, Susan Ryan and now Helen Reddy.
“September has been utterly horribly for iconic women who improved the lives for other women.”
The Pointer Sisters wrote: “We are so sad to hear that #HelenReddy has passed away. Our first television appearance was on her show.”