Cameron Diaz's Beauty Evolution to Celebrate Her 40th Birthday

Cameron Diaz is celebrating her 40th birthday today so we're taking a trip down memory lane and taking a look at her ever-changing beauty look. With her blonde locks and piercing blue eyes, it's not surprising that she started out modelling before she became everybody's favourite funny girl. While she's dabbled with different hair hues over her career, she tend to sticks to her water-rimmed eyeliner and bold lipstick on the red carpet, but off-duty, she's all about the chillaxed hair and fresh-faced look. Step inside and watch her beauty evolve. What's your favourite look?