Rona Newton-John dies, Olivia Newton-John's older sister, Rona, died May 24 in Los Angeles after battling a brain tumor, according to Newton-John's Facebook page. She was 70.
"It was May 25th in Australia - which was our mother Irene's birthday," the Grease star wrote. "Rona died of a very aggressive brain tumor and mercifully suffered no pain. She was surrounded by the love of her four children - Fiona, Brett, Tottie and Emerson and her wonderful friends. I will miss her forever - my beautiful, smart, talented, funny, brave sister Rona."See other celebrities we've lost this year
Newton-John canceled a scheduled appearance in Las Vegas last month to be with her sister after she was diagnosed with the brain tumor.
In honor of her sister, Newton-John (who survived cancer herself 20 years ago) is starting a brain tumor wellness program in Rona's name at the Olivia Newton-John Cancer & Wellness Centre.
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