debuted a shocking hair color transformation via Instagram: the 28-year-old and blonde for as long as we can remember is now—gasp—a redhead! And we don't mean she got red highlights ...

Bleach is a popular ingredient used to lighten hair, but it's not the only option. Here, three celebrity colorists explain ...

To achieve the colour, Hart used Bleach’s Cherry Red dye, a permanent shade that uses no bleach. After a successful strand test, Hart told me the colour would work really well for my hair ...