One Iconic Look: Olivia Newton John's "You're The One That I Want" Ensemble in Grease (1978) Tom + Lorenzo Womens Dress Shoes in Womens Shoes Green Walmart.com This sweet yellow party dress was first seen in the 1978 , where actress Didi Conn wore it as Frenchie. After that, the dress very likely went into rental stock, where it 7 Grease fashion looks that still make perfect sense today Ahead of its time': how Olivia Newton John's final Grease outfit became a cultural phenomenon Olivia Newton John The Guardian