Grease was released in 1978 and Olivia Newton-John played demure Sandy alongside John Travolta as bad boy Danny. The infamous black outfit marked Sandy's transition from a good girl high-schooler ...

This weekend marks Grease’s 40th anniversary. Here, we take a look back at the film’s most iconic outfits ... Sandy’s perm! Danny’s grey tracksuit!) In an ode to the film’s greatness ...