Sabrina Carpenter Dresses as Bad Sandy from 'Grease' for Halloween Amazon.com: Rubies Grease: Sandy Olsson Bad Sandy Costume for Adults, Women's Small Black : Clothing, Shoes & Jewelry This sweet, white 50s style gown with matching capelet was first worn by Olivia Newton John as Sandy in the classic film in 1978. The dress and capelet both made their way Grease getting prequel movie about big Danny and Sandy mystery Sandy had the best wardrobe hands down, in the movie Grease. Patty Simcox was a close second as the poodle skirt girl. Sandy's pink dress is a vision of beauty! The 50s The Real Meaning Behind Sandy's Transformation in Grease