Olivia Newton-John is a British-born Australian singer, songwriter, and actress. She is a four-time Grammy award winner who has amassed five No. 1 and ten other Top Ten Billboard Hot 100 singles and two No. 1 Billboard 200 solo albums. She co-starred with John Travolta in the film adaptation of the Broadway musical Grease, which featured one of the most successful film soundtracks in Hollywood history.