Who doesn't love Jamie Lee Curtis? She is the epitome of the sophisticated, mature woman who is comfortable in her own skin. Big plus: cute hair. This super short style, which she has let go gray, is all Jamie Lee.
My daily inspir-gray-tion -Judi Dench. I think all women should allow their hair to go grey. That way, it's a natural transition you don't have the horrendous block of grey coming after your jet black dyed hair.