Cameron Diaz's Changing Looks

The teen magazine model was a cheerleader at Long Beach Polytechnic High School.

After her acting debut in The Mask, the fresh-faced star became a Hollywood favorite. "Cameron is a living doll," says makeup artist Tracy Warbin. "When she smiles, it lights up her whole face."

The Feeling Minnesota beauty rocked a sleek '60s-inspired bouffant and bold red lips at the ShoWest Convention in Las Vegas.

Soon after her scene-stealing role in My Best Friend's Wedding, Diaz debuted edgy crimped locks.

The There's Something About Mary lead dressed up her blunt bob for the Academy Awards with a bejeweled clip.

Diaz joined her Charlie's Angels costars at the Oscars with blonder locks and matching bleached brows.

The Gangs of New York actress went gorgeously bohemian with messy waves and minimal makeup.

The In Her Shoes star tried out bold red lips. "We've played with a spectrum of lip colors," makeup artist Gucci Westman told InStyle. "She has a great mouth for lipstick."

Princess Fiona, beauty icon? The Shrek the Third voice sported darkened locks similar to those of her ogre character. "Cameron's a natural blonde but can pull off brunet hair too," haircolorist Tracey Cunningham told InStyle. "She switches it up."

The star of The Box wore an effortless-looking style on the red carpet. Says hairstylist Lona Vigi: "She's always on top of her game. She knows what works without trying hard."

For the Academy Awards, Diaz chose high-volume Old Hollywood waves. “She wore such an elegant dress, so we wanted a very 'movie star' moment," says hairstylist Lona Vigi.

She promoted Bad Teacher in London with fun lilac lips.

Diaz showed off her new platinum bob at a Golden Globes after-party. Although the short cut was at first a shock, Diaz told InStyle that she soon warmed up to it: "I thought, No I really like this! It's freeing, and I feel so much lighter."

Diaz changed up her cut for the Costume Institute Gala with an edgy take on a pompadour.

For the L.A. premiere of What to Expect When You're Expecting, Diaz chose a fresh fuchsia lip color.

For an L.A. art event, Diaz sported face-framing curved fringe.

The actress paired her loose ponytail with neutral makeup at a fashion event in NYC.

The The Body Book author opted for a low chignon with dramatic, side-sweeping fringe.

At the premiere of The Other Woman, Diaz showed off sleek, straight strands and a statement lip.

Looking better than ever 2014 photocall for 'Annie' in London, Diaz styled her hair in loose, natural waves and finished the look with a lush, berry lip color.

Keeping her makeup to a minimum, Diaz stepped out at an event in Woodland Hills, Calif., with a fresh-faced glow.