And the answer is...............Maggie Bell.
Maggie was one of the best female vocalists to ever come out of Britain although she never made it over here. She was in a band called "Stone the Crows" who's first, and only I think, two albums were outstanding. Their guitar player was electrocuted on stage at one of their live performances and the band slowly split up after that. Maggie was a fellow Glasgow lass and Rod had a big crush on her growing up, I'm not sure if they had any kind of relationship but she did guest on a few of his early albums with the Faces.