Jennifer Lopez's most recognisable hairstyle - those lavish, voluminous waves from her Super Bowl performance - is not the fruit of a plan, but of a mistake under pressure. And that is exactly what makes the story better than any tutorial clip.

February 2020, Miami, one of the most important moments in the career of both the singer and her hairstylist Chris Appleton. The humidity was straining everything, and rain threatened to cancel the entire live show - so the rehearsal was meant to double as a backup recording for broadcast. Under that nervousness, Appleton grabbed a smaller curler than he usually used.

The result looked wrong - tight, stretched-out curls. But when he combed them out, they turned into something else entirely. That's how the technique he calls the "double curl" was born: first a small curler for elasticity, then a bigger one for a relaxed shape and volume. The mistake became a signature.

The lesson Appleton draws from all of it isn't about curlers, but about fear. Don't be afraid of too much product, he says - he used a volumising spray and spent hours carefully combing out each curl to get a definition that holds from morning until the evening's performance. Behind something that looks easy and natural, there's usually a lot of effort that's deliberately hidden. And sometimes a good mistake at the right moment.