Earlier this year, pop superstar Billie Eilish spent six weeks dyeing her hair from jet-black with slime-green roots to an all-over creamy blonde (she had been wearing wigs up until then), which she ...

Supermodel Kendall Jenner, like the rest of the Kardashian-Jenners, was born with jet-black hair – but that hasn’t stopped her from dying it platinum blonde, a process that took two days to achieve ...