Popularized by Valentino's hot-pink fall 2022 collection, the Barbiecore aesthetic seems here to stay. Celebrities like Lizzo, Hailey Bieber and Khloé Kardashian have helped make it mainstream in pink dresses that Mattel's classic American fashion doll would wear in a heartbeat. But before this resurgence, you could turn to Reese Witherspoon in "Legally Blonde" for a dose of Barbiecore fashion, which can essentially be summed up as trend-conscious ensembles rendered in monochromatic pink.