Image via Getty. 

The world almost stopped spinning this week when Duchess of Cambridge Kate Middleton changed her hair.

Drastically.

By drastically, we obviously mean that it was almost, ahem, unnoticeable.

K-Middy basically got a slight trim (in the form of some “bangs”) and a so-subtle-we’re-not-sure-if-she-actually-did colour change. But nonetheless, it’s a change.

The trim marked her return from maternity leave, as she attended a charity function in London. Nice one, Kate.

Katy Perry.

Katy Perry also decided it was time for a hair change.

The warm chocolate colour suits her - but don't expect it to last.

The 30-year-old chose a sparkling Saint Laurent dress to match her hair for the closing of New York Fashion Week.

The best celebrity hair transformations

Gwen Stefani.

Jennifer Garner.

speaks onstage during the Think It Up education initiative telecast for teachers and students, hosted by Entertainment Industry Foundation at Barker Hangar on September 11, 2015 in Santa Monica, California.

Dakota Johnson.

attends a photocall for 'A Bigger Splash' during the 72nd Venice Film Festival at on September 6, 2015 in Venice, Italy.

katie holmes yoga hair

Katie Holmes' new hair on Instagram.

jess alba shoter hair aug 15

Jessica Alba's shorter, lighter 'do. (Source: Instagram.)

Britney Spears

Lily Allen

Katherine Heigl

GiGi Hadid.

Gigi Hadid wearing a classic, matte brown lip. (Source: Instagram.)

Selena Gomez.

Katy Perry.

cara pink hair 2

Image via Instagram.

phoebe tonkin new hair

Image via Instagram (@phoebejtonkin)

rebecca gibney new hair

giuliana-rancic-short-rose-hair

Jessie J

It's soooo loooooong.

Jenna Dewan-Tatum

Britney Spears

Check out those purple ends

natalie imbruglia hair

Emilia Clarke

Abbey Lee Kershaw

Alanis Morissette

Anna Kendrick

Zoe Kravitz

Laverne Cox

Kate Mara