Here is an excerpt from a website about a hair stylist you may have heard of: 

"Just as there are many techniques in art, there are different techniques a colorist uses when highlighting the hair,” explains celebrity colorist Joel Warren, co-owner of the Warren-Tricomi salons. “I use one or more techniques with every client I color depending on the results they wish to achieve."

Here is the link for celebrity haircolor  info.

and a link for celebrity hairstyles.

Finally, a celeb salon inside of celebrity chat @ this link.