"Strange Changes" is a song that was co-written by the former wife of an American actor known for his role in what 1970's musical-sitcom?
Strange Changes: "Strange Changes" is a song that was co-written by Lynsey de Paul and Sue Shifrin (Sue Shifrin Cassidy), former wife of David Cassidy. David Cassidy: David Bruce Cassidy (born April 12, 1950) is a retired American actor, singer, songwriter, and guitarist. David Cassidy:  He is known for his role as Keith Partridge, the son of Shirley Partridge (played by his stepmother Shirley Jones), in the 1970s musical-sitcom "The Partridge Family", which led to his becoming one of popular culture's teen idols and pop singers of the 1970s.
The Partridge Family