For my recreation, the hardest part was recreating the angle her head was on. It was almost impossible to get the model's chin to lay on her shoulder the way Olivia Newton-John's did. Also, It was a little difficult to get the hair to look the same. I used photoshop to dim the background colors, because they appeared washed out in the original. In the recreation they were very vibrant and washed out the model, so I dimmed them down using the dodge and burn tool.