Solely responsible for turning the classic gym headband into a chic fashion statement, Bella Hadid began wearing this old-school sports accessory last year. Unsurprisingly, it promptly became an Instagram-worthy cool girl necessity. Worn right along the hairline, it's a crafty way to cover up greasy roots.

Contrary to Hadid's simplistic style, maximalist headbands are also having a moment. Sometimes they're knotted, often bejeweled, adorned with rosettes in the case of Chrissy Teigen (creator of the Headband of the Day Instagram series), or padded in the style of Kate Middleton. These are quick ways to add character to an outfit.

When added to a basic bun, even a modest ribbon can take your everyday topknot up a notch. Here, Sienna Miller demonstrates the added bonus of face-framing bangs.

Likewise, an embellished headband does wonders for elevating a ponytail. Even Lucy Hale, whose signature bob winds up being but a tiny tuft when gathered at the nape of her neck, knows the value of this age-old trick.

Among its many abilities, the headband's greatest virtue is perhaps its power to cover up an unforgiving bout of bedhead. No need for a jazzy updo; just pile it precariously atop your head and reach for the chunkiest headband available, Eva Mendes style.

While fun scrunchies, clips, and barrettes are often confined to the long-haired set, headbands don't discriminate against any length of tresses. Pixie cut wearers can partake in this trend, too.

It's when you spend $50 on a fleeting Drybar treatment that this $10 hair accessory really comes in handy. On days when dry shampoo just isn't doing the trick, slick your roots back with a statement headband and tease slightly at the crown for a revitalized second-day style.