This was part of a French SW broadcast.
https://www.youtube.com/watch?v=i9jz0G-RrDs
more from this special:
https://www.youtube.com/watch?v=VSpEo8Onqiw
What makes you think it was filmed on a Fox studio lot?
More interpretive dance:
https://www.youtube.com/watch?v=gMMbdG6eB-8