When it comes to trending hairstyles, the current leader-of-the-pack is without a doubt the half top knot. As easy to create as it is cool to wear, the mini bun style gives you a more modern-chic vibe than just wearing your hair down straight and parted. It's also a lifesaver during the summer heat wave because it lets you pull half of the sweat-inducing hair off of your shoulders and back — perfect if you're not one to go for a full updo. Plus, if your roots tend to get greasy with the heat no matter how much dry shampoo you spray, pulling your hair into a half bun hides the offending locks instantly.

Need more convincing? Every celebrity from the Olsen twins to Shay Mitchell (and she has the best hair in Rosewood, so we totally trust her) has been seen sporting the style. And the list of famous heads of hair trying it out just keeps growing. We got the how-to from Scunci stylist Laura Polko, who's known for the always-cool styles she creates for celebs like Demi Lovato, Victoria Justice, and Ashley Benson. And while we happen to think the half up, half down hair pairs best with a choker necklace, vampy lip, and bold attitude, feel free to accessorize it any way you please after reading our top styling tips:

Wear It With Waves

Polko loves a textured, beachy wave style and to get the look, her go-to product is sea salt spray like Bumble and Bumble Surf Spray. Polko recommends working some dry shampoo through the roots and sea salt spray from mid-shaft to tips, twisting small sections of your hair as you blow dry it to create beachy waves. "Mess it up by rubbing the hair with your fingers to loosen [the waves] up until you get the look that suits you," Polko says. To finish the look, she says, "make a half pony, and simply don't pull the ends through all the way."

Wear It If You Have Shorter Cut

For a slicked back look like Margot Robbie's, Polko says the key is using a fine-toothed comb and a bit of hair gel. Once you've pulled half of your hair back and secured it into a tight bun style, "[spritz] hairspray close to the hair for a slicked back finish." For a truly sleek look, make sure to use bobby pins as needed to lock any stray hair in place.

The best part about the this summer's star style is that it doesn't discriminate against short bobs and lobs. "I think it can be better on short hair," Polko says, adding, "There's less hair in the bun, so it's easier to get the texture and piece-y look you want."

Wear It With Color

Why not try two trends at once by adding a pop of color into your half up, half down look? Rainbow strands are clearly here to stay. Eliminating half of the hair with a top knot is the perfect styling solution for getting temporary color on hair — making the rainbow effect a lot less time-consuming to create. But Polko warns, "Don't just start chalking randomly and think it'll work out." Once you've pulled your hair into the half top knot and styled it wavy or straight, Polko advises you "go in with a [hair chalk] game plan," by picking which pieces of hair you want to color before you start. Use a hair chalk like Fudge Urban Colour Chalk, which works just as well on dark hair as it does blonde, thanks to the white chalk that can be used as a base on dark hair before applying fun colors. Mist with hairspray to hold the color on your hair (and keep it from rubbing off your clothes) and you've got the My Little Pony hair of your dreams.