On this date in 1978, the retro musical "Grease," starring John Travolta and Olivia Newton-John, premiered (Jun 16, 1978). "Grease" began its life as a Broadway musical. When it was adapted to the screen, the filmmakers added a new song for the opening credits called "Grease." The story of the song's creation began when "Grease's" producer, Roger Stigwood, called up Barry Gibb. "How do you write a song called 'Grease'? I don’t understand what direction I would take to do that," asked Barry. And