Hollywood had a significant impact on hair styling trends in the 20th century, with many celebrities influencing popular hairstyles ¹ ²:

- 1940s: Hollywood stars popularized the "peekaboo" or "femme fatale" waves, which featured glamorous waves covering one side of the face.
- 1950s: The "Italian cut" with tousled pinned back curls and head scarves became popular thanks to Audrey Hepburn.
- 1960s: Jacqueline Kennedy Onassis popularized the flipped-up bob, while Cicely Tyson and Nina Simone popularized natural hairstyles and cornrows.
- 1970s: Farrah Fawcett's feathered hairstyle and Carrie Fisher's space buns became iconic looks.
- 1980s: Michael Jackson's Jheri curl and Mike Score's winged cut were popular among men, while Janet Jackson's box braids and Sinead O'Connor's shaved head made statements for women.

Hollywood had a profound impact on hair styling trends in the 20th century, shaping popular aesthetics, beauty standards, and consumer preferences around the world. Here's how Hollywood influenced hair styling trends:

1. **Celebrity Icons**: Hollywood celebrities became influential style icons whose hairstyles were emulated by fans around the world. Actresses such as Marilyn Monroe, Audrey Hepburn, and Brigitte Bardot set trends with their iconic hairstyles, which often became synonymous with glamour, sophistication, and beauty.

2. **Film and Television Influence**: Hairstyles showcased in movies and television shows had a significant influence on popular culture and hairstyling trends. Films such as "Breakfast at Tiffany's," "Grease," and "Titanic" featured memorable hairstyles that became iconic and enduring symbols of their respective eras.

3. **Red Carpet Trends**: Hollywood red carpet events, such as the Academy Awards and the Golden Globes, became showcases for glamorous hairstyles worn by celebrities. Hairstyling trends seen on the red carpet, from elegant updos to sleek bobs, often set the tone for formal and special occasion hairstyles.

4. **Hairstylists to the Stars**: Hollywood hairstylists, known as "celebrity hairstylists," became influential figures in the beauty industry, shaping trends and setting standards for hairstyling techniques and products. These hairstylists worked with A-list celebrities to create signature looks that captivated audiences and garnered media attention.

5. **Globalization of Beauty Standards**: Hollywood's global reach and influence through films, television, and media distribution channels helped to standardize beauty ideals and hairstyling trends worldwide. Hollywood's portrayal of glamorous, aspirational lifestyles contributed to the globalization of beauty standards, with Hollywood-inspired hairstyles becoming sought after in markets around the globe.

6. **Technological Advancements**: Hollywood's demand for high-definition filming and photography drove advancements in hairstyling techniques, products, and tools. Hairstylists developed innovative methods for achieving camera-ready hairstyles that looked flawless on screen, leading to the adoption of new technologies and products by consumers.

Overall, Hollywood's influence on hair styling trends in the 20th century was far-reaching and enduring, shaping cultural perceptions of beauty, style, and glamour for generations to come.