From Sienna's peachy pink hue and Georgia May Jagger's blorange, to Lady Gaga's vibrant turquoise and every pastel wig Kylie Jenner's ever worn, it's official - rainbow hair is the celeb approved 'do we never get bored of.
Check out our edit of the best rainbow hair in the biz so you can embrace your inner unicorn ASAP.
The usual blonde bombshell Hailey Baldwin revealed an electric blue new look whilst on a shoot for luxury brand Chaos. The 21-year-old swapped her recently blush pink long hair for a bright blue messy bob with matching long fringe that had Fifth Element written all over it.
Cardi B just hit us with the cutest rainbow unicorn hair that any pregnant lady ever rocked...ever. Of course, Cardi knows that a whole load of bleach and multi-coloured hair dye isn't great when you're heavily pregnant so hairstylist Cliff Vmir used a sneaky lace-front wig to create her magical half up half down 'do.
Paris Jackson hopped on the rose brown hair trend with her latest peach 'do courtesy of celeb stylist Riawna Capri. Capri captioned the pic of Jackson's rosey hued transformation, 'This is not a filter, this is 🍑 looking like a Bali Sunrise 🌅 '
Nicole Richie gave her usual honey blonde hair a lavender unicorn overhaul with the addition of purple highlights courtesy of Joico's new Color Butter temporary hair dyes. 'I actually saw all the colours and I decided to go lavender', Richie told InStyle. 'Because colour is emotional, and I was here and I was like, you know what, lavender was the first colour that I had when I started colouring my hair. It's cooling and soothing, and it just felt like where I wanted to go today.'
Lena Dunham gave her pixie cut a mermaid overhaul transforming her previous blonde/brunette hair into a bright blue and dark grey 'do. Dunham posted a selfie of her new look with the caption: 'Thank you for handling my pompadour and for the hot smurfjob. Love you mean it 💎'
Lady Gaga debuted a new orange, yellow and turquoise peacock 'do ahead of her upcoming Joanne world tour.
Farewell signature lilac hair, Kelly Osbourne just got a tangerine overhaul courtesy of celeb colourist Joshua Anderson.
Swapping her light blonde locks for a rose gold hue, Lottie Moss proved pink is always in.
Wig or no, we kinda love Salma Hayek's bubblegum overhaul for the Kering Women In Motion dinner at Cannes 2017.
Swapping her everyday blonde for a glittery blue bun, Hailey Baldwin turned to hairstylist Florido Basallo to transform her locks for a galactic-theme birthday party. Space buns don't get better than this.
Swapping her blonde locks for a shade of baby pink, GOT star Sophie Turner embraced the Coachella festival vibes.
Model Irene Kim works every colour in the rainbow.
The way to work pink hair on the red carpet? Go for old Hollywood waves and match your 'do to your dress Pixie Lott style.
Let us count the ways we love Ruby Rose. No. 1 - her ability to pull off a dark green halo braid.
Another day, another rainbow dye job for Kylie Jenner. Her uber long peach hair is all we want for our Summer transformation.
Proof that Britney Spears is actually a mermaid in real life.
Model Chloe Norgaard masters how to make grey and sea green hair work.
Amber Le Bon proves that pastel pink hair can look super chic.
The biggest celeb hair transformation of the year, Bella Thorne's natural redhead to sea green went straight on the Pinterest board.
Katy Perry gives old Hollywood waves an edgy purple update.
Zayn Malik with pink hair? We're in.
Working her signature woodland elf meets super cool musician look, we're loving Grimes' pastel pink and black hair.
Sleek, chic and red carpet ready, Nicole Richie's blush coloured hair is firmly on our beauty to-do list.
Rainbow hair doesn't always have to mean paint box brights. Work a grungier shade by adding grey undertones to a pastel colour like Hilary Duff.
Yet another colour reinvention for Katy Perry and we're loving her tousled lavender waves.
Nicole Richie is just too cute. A sleek flicked bob in a muted sky blue looks chic without straying into twee territory.
Kylie's bright red braids might have been a wig but we're all about the bold shade.
Ellie Goulding debuted new yellow locks at the MTV EMA's in Italy, October 2015.
She's never been one to shy away from rainbow colours, and this time, Sky Ferreira's gone really, really blue.
Georgia May Jagger was the latest celebrity to join the rainbow hair club, courtesy of BLEACH Manchester August 2015.