Brunettes!
Robert Plant or Robert Palmer
(FYI: Robert Plant was the lead singer of Led Zeppelin and re-defined rock singing in the late 60s through to today with his high teor histrionics, head-voice blend of some chest grip and raspy falsetto singing and whiny type 1920's blues singer influences.)
(FYI: Robert Palmer helped re-define blue-eyed soul. The British pop/soul vocalist was most famous for his hits "Addicted to Love" "Bad Case of Loving You" "Some like it Hot" "Bang on a Gong" "what's Going on?" and featured a very smooth and husky bari-tenor masculine delivery)