One thing I can say is that the French love their musicals. Watching this I get the feeling that it was either adapted from a play, or it was written by a playwright rather than a screenwriter. The story line is incredible. It's full of twists and turns, and it's all about these 8 women who all thing any one of the other seven did it. the only thing I didn't like about the movie was the fact that they randomly burst out into song every so often. Each woman had her own song at some point, so there were 8 songs in the whole movie. But there were several twists and it was fabulous. Apparently, all of the actresses are really famous in France, but the only 2 I really know are Catherine Deneuve & Fanny Ardant. Fanny Ardant was Mary of Guise in Elizabeth and she totally has this aging sex bomb thing going on. Catherine Deneuve has made literally almost 100 movies.
French murder-mystery-musical. Very good, with some fun twists.