Who ever thought My little Pony would make such a huge comeback? 

Katy Perry, Christina Aguilera, Britney Spears and Demi Lovato were just some of the stars that went for bright and colourful rainbow hair in 2012. 

And although it’s not something anyone can (or should) pull off, we love the quirkiness of this style.

From pinks to blues, purples and greens – Hollywood has really gone haywire for the rainbow hair trend.

Rainbow hair is: