Pink hair isn't going anywhere. In fact, whether it's being called rose gold, rose quartz or rosé, it seems that pink hair finds a way to reinvent itself and stay on our radar year in and year out. Where it was once a frivolous colour reserved for summer holidays and festivals, now the A-list prove that while pink hair is fun, it can look seriously chic. And you don't have to go all-out with a heavy allover colour if you don't want to. Sienna Miller and Hailey Baldwin prove that a subtle hint of pink can look understatedly beautiful, or throw caution to the wind and do a Helen Mirren. Take a look and see for yourself.