The most basic hair accessory -- a casually cut piece of black ribbon -- is also the coolest for fall 2016. At Kate Spade, hairstylist Recine for Beauty.com created a simple low ponytail and secured it in place with a velvet ribbon. And hairstylist Jordi Martinez-Fenoll for Fekkai created an almost identical look at Angel Sanchez.

At Mansur Gavriel, Bumble and Bumble Global Artistic Director Laurent Philippon used Bumble and Bumble Surf Spray and Dryspun Finish to braid models' hair with lots of texture before securing the ends with a ribbon. And at Suno, hairstylist Odile Gilbert for Kerastase Paris wrapped ponytails with ribbon and locked it in place with Kerastase Laque Dentelle.

Intricately knotted ponytails are another huge hair trend for fall 2016. We're predicting it now: It's going to be a good season for wedding hair.

At Leanne Marshall, Aveda guest artist Jon Reyman designed a macram�é-inspired cobra knot around the base of the ponytails. Meanwhile, backstage at Jonathan Simkhai, hairstylist Thomas Osborn used Catwalk by Tigi products to create a double "Nordic" knot.

These intricate knots may not be easy to recreate at home, but pin them for next time a pro styles your hair.

Glitter is always a good idea -- especially this fall where the trend will be to use glitter in unexpected ways.

At Opening Ceremony, makeup artist Yadim for Maybelline New York created a futuristic effect with pretty slashes of glitter across an otherwise bare face.

At Jenny Packham, Bobbi Brown dusted Sequin Eye Shadow (which won't be available until holiday 2016 -- put a reminder on your calendar now) across matte cheeks and eyes.

And at Brother Vellies, Sephora Pro Lead Artist Helen Phillips gave the trend a metallic slant with Kat Von D Metal Crush Eyeshadow in Static Age and Make Up For Ever Metal Powder in Sunflower Gold 1.

Season after season, makeup artists reinvent the classic cat eye, and the fall 2016 shows were no different. At Marc Jacobs, Francois Nars used practically every black eyeliner in his kit to create elaborate eye makeup looks, the most wearable of which was this open, almond-shaped outline. At Oscar de la Renta, Diane Kendal used M.A.C. Creme Liner in Black to create a similar yet subtler version of an open, squared off oval. And Val Garland used the same black liner at Monique Lhuillier to create a thick, blunt edge above the upper lashes.

Black lipstick is back, but for fall 2016 you'll want to layer red or berry over black. Backstage, makeup artists tapped the color on with their fingers for a lived-in, stained effect.

Shades varied from plum at Zac Posen to berry at Naeem Khan (Maybelline Color Sensational The Loaded Bolds Lip Color in Smoking Red -- launching in June) to burgundy at Rodarte (Nars Audacious Lipstick in Liv).