UPDATE -----------------------------------------------------------------------

1:10 PM PT -- John Travolta just posted about Olivia's passing, saying, "My dearest Olivia, you made all of our lives so much better. Your impact was incredible. I love you so much. We will see you down the road and we will all be together again. Yours from the first moment I saw you and forever! Your Danny, your John!

Olivia Newton-John, who soared to international stardom as both a singer and movie star has died.

Olivia's husband, John Easterling, says she died peacefully at her ranch in Southern California Monday morning, surrounded by family and friends. Olivia has battled breast cancer for more than 30 years, a specific cause of death was not given, although a source close to Olivia told TMZ, "After a 30-year cancer journey, she lost her battle to metastatic breast cancer."