Olivia Newton-John Dead at 73

He was a singer and a movie star.

John Easterling said that his wife died peacefully at her ranch in Southern California on Monday. After battling breast cancer for more than 30 years, a specific cause of death was not given, but a source close to her said, "After a 30-year cancer journey, she lost her battle to metastatic breast cancer."

"If Not for You" and "Let Me Be There" were some of the best songs of the 70's. She followed that up with a monster hit.

She got her big break in 1978 when she starred in "Grease". "You're the One that I Want," "Summer Nights," and "Hopelessly Devoted to You" are just a few of the songs she played in "You're the One that I Want."

She followed it up with movies like "Xanadu".

"Physical" was the biggest hit of all time and stayed at the top for 10 weeks. Throughout her career, she was an animal rights activist.

When she was diagnosed with breast cancer in 1992, it went into remission before coming back in 2013).

The couple met while filming the movie "Xanadu" in 1984. In 1986 they had a baby. The couple divorced in 1995.

John Easterling was her husband in 2008. He founded AmazonHerb Co.

A 73-year-old man is dead. I am sad.