Honestly, from the way it looks and the way she sounds , I'd say there's something fake in there. Judging from my experience with TF1's proneness to sensationalism in their tv shows, they may have pushed her to exaggerate a real discomfort on camera, led her to put forward her pre existing back issues or even created this act altogether.
Anyway, I've never liked those "behind the scenes" bonus videos betwen the show...
