Cara Delevingne with her trademark tresses back in January.

She makes a radical hair transformation in May which she shows off to the world at this year’s Met Gala Ball.

Cara’s latest look was seen during Haute Couture Fashion Week in early July.

Emma Stone’s red waves wowed the world at this year’s Academy Awards.

She’s now a warm shade of blonde and she looks absolutely gorgeous.

Kate Middleton’s hair has always been her crowning glory and the Duchess has been fan of the longer style for a while.

The stylish royal surprised us all by stepping out with a new shorter style at the Wimbledon Tennis championships.

Girls writer and director Lena Dunham at human rights event earlier this year.

The multi-talented performer, who also stars in the show, has just revealed her latest look: a dramatic buzz cut that’s got everyone talking.

Kristen Stewart’s style transformation has us transfixed. Here she is on the red carpet in Cannes with her cropped blonde ‘do.

And her punky style keeps getting better. This is K-Stew at a party in Paris during Couture Week, celebrating Chanel.

Zoe Kravitz at the Whitney Museum in March. The actress sports platinum cornrows in a swish up-do.

Like so many of her contemporaries, Zoe now rocks a sweet pixie crop.

Singer Katy Perry is the queen of switching it up. Here she shows off a more demure lob at this year’s Grammy Awards.

This is the singer’s latest style which she debuted at Paris Fashion Week Haute Couture Week.

Actress Emma Roberts with a gentle shade of strawberry at the Vanity Fair Oscar party in February this year.

Emma’s since opted for a dramatic change, stepping out on the red carpet at the Met Gala Ball in May with her long locks coloured a deep mahogany.

Karlie Kloss in March outside Dior’s Paris Fashion Week show.

The model has since gone platinum and she looks absolutely amazing!

British actress and model Suki Waterhouse.

What a difference a year (and a great cut and colour) makes! Suki’s shorter style makes for a snappy change.