Lindsay Lohan has revealed why she likes changing her hair colour constantly but says she can get treated like a dumb blonde when she gets out the bleach.

The actress - who is naturally ginger - reckons it makes people see her as an airhead.

‘I think people think I’m more stupid,’ she says.

‘I just [use it as] an excuse now. I can say it’s the hair if I sound silly sometimes!’

But 21-year-old Lindsay says overall she’s content with the way she looks.

‘There are things I’d change, but I’m happy,’ she says.

‘I’d like to be taller [but] I don’t believe in weighing myself or checking my height because then, when people ask, you feel obliged to say.’