Scarlett Johansson's Changing Hair

Scarlett Johansson loves experimenting with her looks.

The 'Iron Man 2' actress - who is regularly voted one of the world's sexiest women - likes to change her appearance, especially her hair colour and style, as she thinks it's all part of being female.

She said: "I've had so many hair colours and I've worn loads of wigs. For me, it's part of the fun of being a girl - changing your looks and exploring different ones for yourself. I always like to do that."

The 25-year-old beauty enjoys having fun with fashion but doesn't think her style is any different to that of women in her native New York.

She told Look magazine: "I'm a girl - of course I like getting dressed up. I'm a girlie girl, I like clothes, fashion and all that stuff. It's fun.

"But I think I dress like a regular girl from New York."

In 'Iron Man 2' Scarlett - who is married to actor Ryan Reynolds - has to don a tight suit for her role as Black Widow and she admits it took some work to look good in it.

She said: "I definitely adopted a really healthy lifestyle. I did strength training, a lot of core work and all of that stuff. It's all about building strength and agility."