Im looking for the name of a movie I remember watching all the time as a kid. It was probably in the late 80's - 90's. The details are really sketchy.. I don't remember much. All I remember is this... a girl is trapped by some evil woman, who has a gallery of woman's heads in glass cases along the walls, and she changes her head... and the girl steals this evil woman's key while she's sleeping. I wish I could remember more.. but that's about it. Thanks.

That is "return to oz" the second part of the wizard of oz

That's right return to oz the woman with the heads is mambi and faruza balk plays dorathy