Credit: Vince Bucci/Jason Merritt (Getty Images) Photo: Happy Birthday, Cameron Diaz! Does She Look Better at 40 or 30?

There’s something about Cameron Diaz — the star looks better today than she did ten years ago!

The famed actress has been in the business since 1994’s The Mask, but she has undergone many style transformations, particularly in the last decade.

Cameron made the biggest change to her hair, chopping off her long, straight golden blond locks in favor of a chic, lighter bob with side-swept bangs and highlights last year.

At the Rock the Earth Summit Party on Aug. 12, 2002 (pictured left), Cam opted for a coral-colored lipstick and minimal makeup, showing off her smooth complexion. At the time, she was nearly 30, but looked youthful, mostly due to her long hair.

This year, at the What to Expect When You’re Expecting premiere on May 14, 2012 (pictured right), she wore bright pink lipstick, highlighted her cheekbones with a rosy blush, and showcased her pale blue eyes with a pop of mascara. It’s no surprise that at 39 she still remained youthful, but with a more sleek, polished, and mature look.

While Cameron has maintained her gorgeous glow over the past 10 years, we want to know which decade she looked best in. Did she look better at 30 or 40? Tell us below!