* 1960s Fashion: Big hair was a significant trend in the early 1960s, the period in which Hairspray is set. Hairstyles like beehives, bouffants, and flipped-out styles were popular. Tracy's hair is an exaggerated version of these trends.
* Rebellion and Individuality: Tracy is an outsider who challenges the status quo. Her big hair is a visual representation of her larger-than-life personality and her refusal to conform to societal norms. It's a way for her to stand out and express herself.
* Symbolic of the "Big Hair, Big Dreams" Theme: The musical's themes revolve around dreaming big and pushing boundaries. Tracy's hair is a visual metaphor for her big dreams and ambitions. It's a way of saying, "I'm here, I'm big, and I'm not going to be ignored."
* Comedy and Theatricality: Hairspray is a comedic musical, and the exaggerated hairstyles contribute to the overall lighthearted and over-the-top tone of the show. The big hair is visually funny and memorable.
In short, Tracy's big hair is a combination of historical accuracy, character development, thematic symbolism, and comedic effect, all rolled into one gravity-defying style!