Olivia Newton-John delighted her social media followers this week after taking them on a trip down memory lane.MORE: Olivia Newton-John expresses her heartache over tragic lossThe Grease star took to Instagram to share a collage of photos from the music video for her hit song Physical.Reminding her fans of her pixie haircut at the time, Olivia looked stylish rocking the short 'do, along with a bold smokey eye and bronzer.VIDEO: Olivia Newton-John gets real about cancer diagnosis A pink lipstick