Jazz Tangcay Artisans Editor In Greta Gerwig’s “Barbie,” Margot Robbie’s Stereotypical Barbie’s perfectly pink world is rocked to the core when she has an existential crisis during a dance party. What follows is a sequence of events that propel her into an emotional journey as she begins to grow closer to the real world. “It was important that her evolution into becoming human could be reflected in the hair, makeup and costumes,” says Robbie, who also served as the film’s producer.