Selma Blair
Natural brunette Selma Blair went for an extreme bleached crop in 2008.
As Katy Perry 'accidentally' goes blonde we take a look at celebrities who have experimented with colour and ask, should they have hit the bottle?
Katy Perry
Pop sensation Katy Perry, who usually sports chestnut brown hair, unveiled her new look at the world premiere of
The Smurf movie . Katy described her new look on Twitter as an 'epic fail'.
Lily Allen
Lily is not afraid of experimenting with her look but rather than dying her naturally brown hair, the singer opted for a blonde wig at Glastonbury. Later in the day she was seen wearing a racy purple jumpsuit with hair to match.
Mary-Kate Olsen
Style icon and one half of the Olsen designer-duo, Mary-Kate, briefly wore her hair in a mid-brown tone before resorting back to her famed blonde, 'bed-head' look.
Rachel McAdams
Sherlock Holmes actress Rachel McAdams used to have a severe brunette bob. She later reinstated her blonde, wavy hair to great effect.
Reese Witherspoon
Reese died her hair dark while promoting her film Vanity Fair. Ironically, the actress who is best known for her role in Legally Blonde, said that she prefers life as a brunette.
Renee Zellweger
Renee shows that the same crop in both colours can look great as long as you alter your make-up to match.
Scarlett Johansson
Scarlett Johansson, whose blonde tresses have often been compared to those of Marylin Monroe, has experimented with various shades of brunette over the years. Explaining her change from her usual blonde shade, the actress said: 'It's part of being a girl.'
Japanese actress Kiko Mazuhara with a Chanel Boy Bag
