Olivia Newton-John's Last Social Media Post Will Leave You Heartbroken

Olivia Newton-John, the powerhouse star of "Grease" and "Xanadu," died at the age of 73 in her Southern California ranch home

The singer behind hits like "Physical" and "You're the One That I Want" was diagnosed with cancer in the 1980s,

and though she was in and out of remission for the next 30 years, it appears cancer was the cause of death.

The representative who confirmed her death did not specify the cause of death, but a close family source told TMZ

"After a 30-year cancer journey, she lost her battle to metastatic breast cancer."

Her husband issued an official statement about her death, which stated,

 "Olivia has been a symbol of triumph and hope for over 30 years, sharing her breast cancer journey. 

 Her healing inspiration and pioneering experience with plant medicine live on through the Olivia Newton-John Foundation Fund, which is dedicated to studying plant medicine and cancer."