Back in the early 2000s, all the cool girls crimped their hair. Hilary Duff, Britney Spears, and Beyoncé all did it — and if you were a Millennial with a hot pink flat iron, you probably did it too.

Fast forward two decades, and Y2K is trending — which means that the wavy hairstyle is making a comeback alongside low-rise jeans and the Backstreet Boys . But just like the Millennials who once wore it, the look has grown up. Today’s version swaps butterfly clips for a sleeker, more elevated finish that’s easy to wear and even easier to achieve.

“Nostalgia is powerful, and social media has made it easier to reimagine these trends in fresh, elevated ways,” says Joseph Maine , celebrity hairstylist and co-founder of Trademark Beauty . “In 2025, we crave individuality, and these style

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