Scarlett Johansson has had many different hair colors and styles. But this rich auburn does wonders for her peaches and cream skin tone. The straight style showcases healthy, shiny tresses.

What can we say? There's just no need to ever go anywhere except Mardi Gras looking like a tie-dyed fern on steroids. Even musical artists need limits when it comes to outrageous hair creations.

Cameron Diaz is known to the world as a bubbly California blonde. But for a brief moment not too long ago, she took a turn as a chocolate brunette. The results were stunning. She looked so exotic, mysterious and beautiful, we wonder why she went back to blonde.

Once just another highlighted Hollywood teen queen, Hilary Duff grew up and took her own hair color tour of duty, trying just about everything from her usual blonde to this stark dark brown. Sometimes you have to hit bottom before admitting you have a problem. This harsh shade is all wrong for Duff's skin tone, unless she's hoping to land a role as a vampire.

Ashlee Simpson-Wentz may fake a few things, like her hair color. But when she does, she does it well. This glossy chocolate shade, paired with a sassy shag haircut, may have been her finest hour. This look inspired imitators everywhere and continues to do so today.