Either everyone in Hollywood has forgotten to touch up their roots or we have a new trend on our hands...
Two-tone hair, or dip-dye hair, is quickly becoming a favourite trend. These 7 celebs show how its done:
Scarlett Johanssen shows how you can subtly follow the trend with a less drastic change in colour:
Whitney Port and Lo Bosworth rock the dip-dye pony tail:
And Nicki Minaj takes dip-dye to a whole new level: