Well I don't have "hair idols"...
But 2 women that have hair that I just think is fabulous is Kabra Kasai (an Ethiopian Jewish Israeli singer and Yvette Nicole Brown (an actress)..here are photos:
Kabra Kasai:

She usually has jet black hair....but I guess she decided to lighten it at one point.. couldn't find the pics with black hair.
Yvette Nicole Brown