While John mourned, he shared a sweet Instagram post honoring her and the iconic '70s movie that led to their deep years-long friendship. "My dearest Olivia, you made all of our lives so much better.

Most musical movies don’t produce one No. 1 hit, however, Grease gave the world two No. 1 hits. One of these songs was written by Barry Gibb of the Bee Gees.

Both John Travolta and Olivia Newton-John confessed that their favorite song from Grease is “You’re the One That I Want”. Olivia noted that her friend John Farrar wrote the song for the movie.

The hook of the song “grease is the word, it’s the word that you’ve heard” is certainly offbeat, but it’s interesting. It also helped to emphasize one of the major themes of the film ...

John Travolta made a surprise appearance at Friday night’s “ Grease ” sing-a-long at the Hollywood Bowl dressed as his iconic drag racing, hip swinging 1950s bad boy Danny Zuko.