The final sequence of Grease is one of the most iconic moments in film history but also one of the most controversial. After spending the movie as a shy good girl, Sandy (Olivia Newton-John) gets a makeover into a sexy bad girl, trading poodle skirts for skintight pants and straight hair for a curly look. She and Danny (John Travolta) also sing "You're The One That I Want" to the delight of generations of fans. But the scene is either fun and sexy or demeaning and sexist, depending on who's asked.
Source：https://www.cbr.com/real-meaning-sandy-transformation-grease/
