Olivia Newton-John and John Easterling - Together Since 1992

Olivia Newton-John, a British-American singer-songwriter, has amassed an impressive record sales figure exceeding 60 million copies. With four chart-topping hits in both the US and the UK, she stands as a musical sensation. Beyond her musical accomplishments, she's also celebrated for her iconic portrayal of Sandy in the 1978 musical comedy "Grease," alongside John Travolta, where she played Danny's girlfriend.