Good Hair Color vs. Bad Hair Color

Classy. Whether she's legally blonde or brunette is moot — she flirts with both. Which is exactly why Richie briefly went red.

Fab. Cameron Diaz's famous icy blues pop with both blonde and black tresses, but her skin glows more when she's goldie-locked.

Drab. Insider info: Dyed-black hair can be striking — but also unforgiving when it comes to skin imperfections like breakouts, fine lines, and dark circles. To soften the look, ask for a multitonal brown or a few highlights.

Fab. Yes, her music's gotten more serious lately, but Natalie Maines's looks are lovelier when she lightens up.

Drab. Insider info: Unfair advantage: Blonde strands can turn a curvy woman into a bombshell, while darker shades say the lady is a frump.

Fab. Mandy Moore, lucky girl, can pull off myriad hues. But while the chocolate brown is sweet on her, the rusty version's an acquired taste.

Drab. Insider info: Red hair is a risk unless your skin has pink under-tones. Complexion-wise, Moore's literally a golden girl, so red and her skin clash, says Hazan.

Classy. Pop star Ashlee Simpson's better off warm and beachy — as opposed to just bleachy.

Brassy. Insider info: If you're fair-skinned, platinum strands can wash you out, says Hazan. Case in point: Simpson had to compensate for her hair's skin-sallowing effect with dark eye makeup and piles of bronzer. (And who wants to be that high-maintenance?)