Singer/actress Olivia Newton-John is postponing an upcoming Las Vegas show to be with her older sister who has been diagnosed with brain cancer.
Olivia, who battled breast cancer 20 years ago, added, "As a cancer 'thriver' myself, as many people are, I am very aware of the importance of love, support and family during this journey she is about to begin. I want to thank everyone in advance for respecting our privacy during this difficult time. "
The Australian pop singer was to fill in at the Las Vegas Flamingo hotel for Donny and Marie Osmond on their away dates.
Rona was married to Newton-John’s “Grease” co-star Jeff Conaway from 1980 to 1985. Conaway died in 2011 at age 60.