The first time I heard of an idea like this was for a videogame called "Dead Head Fred" where:
The core gameplay revolves around Fred's missing head. By progressing through the game the player can collect an assortment of different heads which all have different abilities.
But then a while later the Sci-Fi channel aired a pilot for a show called simply enough, "The Amazing Screw-On Head" where:
[The author] imagined a robot with a head that screwed onto different bodies to suit the occasion-hence the "Screw-on Head".
Just thought it was interesting.