Looking back at Olivia Newton-John’s iconic moments

Olivia Newton-John readies herself for her role in the movie version of "Grease," in Los Angeles, Aug. 30, 1977. Ms. Newton-John star with John Travolta and Stockard Channing in the film. (AP Photo/Nick Ut)

Actresses and co-stars Stockard Channing, left, and Olivia Newton-John ready themselves for their roles in the movie version of "Grease," in Los Angeles, Aug. 30, 1977. Ms. Channing and Ms. Newton-John star with John Travolta in the film. (AP Photo/Nick Ut)

Actress Susan George, left, singer Olivia Newton-John, center, and Australian actress Chantal Contouri, right, get together at the opening party for a new diamond merchant’s store, “Ice” in Beverly Hills, California, Aug. 8, 1979. (AP Photo/George Brich)

FILE - Australian pop-singer Olivia Newton-John poses in Los Angeles, Calif., on Nov. 21. 1982. 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. She was 73. (AP Photo/Reed Saxon, File)

Olivia Newton-John, left and Christie Brinkley display Save Our Coast T-shirts as they join fellow Malibu residents in opposition at a public hearing by the Los Angeles County Board of Supervisors on the construction of sewers in the coastal community, Oct. 22, 1987. (AP Photo/Nick Ut)

FILE - Olivia Newton-John appears during an interview in Los Angeles in December 1990. 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. She was 73. (AP Photo/Julie Parkes, File)

Actress and singer Olivia Newton-John accepts The Cadillac Concept Cure Humanitarian Award during the Fourth Annual Women in Hollywood Awards luncheon sponsored by Premiere Magazine, Thursday, Jan. 8, 1998 in Beverly Hills, Calif. Newton-John was honored for her efforts devoted to breast cancer research. (AP Photo/Nick Ut)

Singer Olivia Newton-John performs July 31, 1999 in Reno, Nev. As Newton-John, who turned 51 Sept. 26, completes her first United States tour since 1983, she'll turn to her first movie role since "Two of a Kind" that same year. Newton-John will play a singer in the independent film "Sordid Lives." (AP Photo/David Hunter)

Singer Olivia-Newton John arrives with British recording artist Sir Cliff Richard for the 39th Annual Country Music Association Awards Tuesday, Nov. 15, 2005. (AP Photo/Stuart Ramson)

Olivia Newton John performs before the men's singles final match between Lleyton Hewitt of Australia and Marat Safin of Russia, on Rod Laver Arena at the Australian Open at Melbourne Park, Melbourne, Australia, Sunday, Jan. 30, 2005. (AP Photo/Rick Stevens)

Olivia Newton-John accepts the "Lifetime Achievement" award during The Penfolds Icon Gala Dinner at the Hollywood Palladium in Los Angeles Saturday, January 14, 2006. The event brings together and honors Australians who have made significant international contributions across various industries. (AP Photo/Branimir Kvartuc)

FILE - John Travolta, left, and Olivia Newton-John arrive at the The Penfolds Icon Gala Dinner in Los Angeles on Jan. 14, 2006. Travolta, who starred with Newton-John in "Grease," presented Newton-John with the "Lifetime Achievement award. 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. She was 73. (AP Photo/Branimir Kvartuc, File)

Australian singer Olivia Newton-John, center, escorts by a Chinese medical officer as she walks with other participants on the Great Wall of China during the Great Walk to Beijing in Jinshanling, China, Monday, April 7, 2008. Olivia Newton-John takes the first of a million steps on her journey along the Great Wall of China, leading a team of Australian and International celebrities on an arduous 228 kilometer trek hoping to raise money to build a new cancer and wellness center, as well as further international cancer research. (AP Photo/Andy Wong)

British born actress Olivia Newton-John poses with a pink ribbon prior to a visit to a Vienna hospital, Monday, Oct. 5, 2009, on international breast cancer day. As a breast cancer survivor, Newton-John regularly promotes public awareness of the disease and the importance of early detection. (AP Photo/Ronald Zak)

Olivia Newton John and her husband John Easterling pose for a portrait Thursday, April 2, 2009 in New York. (AP Photo/Jeff Christensen)

Australian star Olivia Newton John, left, reacts with American talk show host Oprah Winfrey as John holds the original costume she wore in the movie "Grease" during the filming of "Oprah's Ultimate Australian Adventure" at the Sydney Opera House in Sydney, Tuesday, Dec. 14, 2010. (AP Photo/ Jeremy Piper)

From left, Australian author Stephen Elliott, British-born actress Olivia Newton John and British actor Kris Marshall smile during the photo call of the movie "A few best men" at the 6th edition of the Rome International Film Festival in Rome, Friday, Oct. 28, 2011. (AP Photo/Pier Paolo Cito)

Australian actress Olivia Newton-John signs a copy of her book 'Livwise' at a central London bookstore, Thursday, April 19, 2012. (AP Photo/Joel Ryan)

Olivia Newton-John speaks on stage at the American Country Awards at the Mandalay Bay Resort & Casino on Tuesday, Dec. 10, 2013, in Las Vegas, Nev. (Photo by Frank Micelotta/Invision/AP)

FILE - In this Tuesday, Dec. 10, 2013, file photo, Olivia Newton-John arrives at the American Country Awards at the Mandalay Bay Resort & Casino, in Las Vegas. The 65-year-old singer and actress announced a headlining residency Tuesday, Feb. 4, 2014. She will perform 45 shows at the Donny and Marie Showroom at The Flamingo, starting April 8. Dates are scheduled through the summer. (Photo by Chris Pizzello/Invision/AP, File)

Hayley Orrantia, from left, Olivia Newton-John and Wendi McLendon-Covey and present the award for song of the year at the 50th annual CMA Awards at the Bridgestone Arena on Wednesday, Nov. 2, 2016, in Nashville, Tenn. (Photo by Charles Sykes/Invision/AP)

FILE - In this Oct. 4, 2016 file photo, actress and singer Olivia Newton-John attends the premiere of HBO's "Divorce" in New York. Newton-John says she has breast cancer and is canceling her June tour. The 68-year-old singer announced Tuesday, May 30, 2017, that she initially thought she was suffering from back pain, but learned it was “breast cancer that has metastasized to the sacrum.” (Photo by Andy Kropa/Invision/AP, File)

Olivia Newton John performs during the Viña del Mar International Song Festival at the Quinta Vergara in Viña del Mar, Chile, Thursday, Feb. 23, 2017. Believed to be one of the largest musical events in Latin America, the annual five-day festival was inaugurated in 1960. (AP Photo/Esteban Felix)

FILE - Actress and singer Olivia Newton-John attends the 2018 G'Day USA Los Angeles Gala in Los Angeles on Jan. 27, 2018. 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. She was 73. (Photo by Richard Shotwell/Invision/AP, File)