Hollywood Celebrities Like Katherine Heigl Change Up Hair Color And Style Often

Katherine Heigl. She loves to change up the hair and the style quite often. The woman is lovely, no argument there....BUT....are you really digging the pageant bouffant hairdo and too dark color??!!

What's going on here? Ever since she became a mommy, well, er.....something seems a miss with her hair. We caught a glimpse of Katherine Heigl last evening in London, where she is promoting the debut of her new film, Killers.

Even People magazine diplomatically took issue with Katherine's new do:

"When she headed to London for today’s U.K. debut, the 31-year-old actress amped up the look — and quite possibly her age, with a structured bouffant that reminded us of the sprayed-in-place coifs from the Reagan-era ’80s. Paging Designing Women! Though the chic mom can pull off just about any look, it’s a distinct departure from the soft-and-pretty Hollywood hair standard we’re used to seeing on the red carpet."

Ouch!

Many Hollywood beauties change up the hair and style quite often, and not always because of a new movie role. Julia Roberts easily transforms from auburn to brunette to blonde, and back again and again. A few weeks ago, we saw Julia on Oprah's show as a blonde. And just last night at a red carpet event, Julia was photographed hanging with Oprah, and this time, Julia was back to being a medium brunette. We don't like Julia Roberts as a blonde, but many fans do.

If you want to switch hair colors, of course you can.....but tread so carefully. Here are a couple of super hair color tips from the Hollywood color genius himself, Kim Vo:

1. Which head of hair poses the biggest challenges for coloring---blonde, brunette, black, or red? And why.

Kim Vo: Although blondes are very tricky, not all blondes are created equal. Matching skin tones is crucial to create the perfect blonde. The biggest challenge are reds. The red color molecule is the smallest of all colors. It's like a tropical rainstorm. It's tempest and dramatic at first and then quickly fades.

2. So then, is skin tone the most important factor when considering hair color? And can u give us tips?

Kim Vo: Skin tone is the most important factor in deciding your perfect color. It takes a professional eye to determine, but for a simple read, use the veins on your wrist. If your veins are blue, warm tones like chestnut and auburn tones are for you. If your veins are more green, caramel and golden hues will compliment you. If your veins are blue/green, then warm and cool tones can be added seamlessly.