Olivia Newton-John, superstar singer and actress, dies at 73

In this Jan. 27, 2018 file photo, Olivia Newton-John attends the 2018 G'Day USA Los Angeles Gala at the InterContinental Hotel Los Angeles. Two collectors said you're the one that I want to Newton-John's iconic "Grease" leather jacket and skintight pants at an auction in Beverly Hills, Saturday, Nov. 2, 2019. Julien's Auctions says the combined ensemble, which Newton-John's character Sandy wears in the closing number of the 1978 film, fetched $405,700 total. The leather jacket sold for $243,200 and the pants, which Newton-John famously had to be sewn into, went for $162,500. (Photo by Richard Shotwell/Invision/AP, File)

NEW YORK (AP) - Olivia Newton-John, the Grammy-winning superstar who reigned on pop, country, adult contemporary and dance charts with such hits as "Physical" and "You're the One That I Want" and won countless hearts as everyone's favorite Sandy in the blockbuster film version of "Grease," has died. She was 73.

Newton-John, a longtime resident of Australia whose sales topped 100 million albums, died Monday at her southern California ranch, John Easterling, her husband, wrote on Instagram and Facebook. "We ask that everyone please respect the family's privacy during this very difficult time," the message said.

From 1973-83, Newton-John was among the world's most popular entertainers. She had 14 top 10 singles just in the U.S., won four Grammys, starred with John Travolta in "Grease" and with Gene Kelly in "Xanadu."