DD, thanks for the link to that other thread.

Kat, I think that everyone agrees that Beyonce can sing. There seems to be some disagreement about how well she can act, and specifically how well she portrays Etta.

A few parts of Cadillac Records were filmed in and around New Orleans, and Orleanian Terrance Blanchard is credited for the film's musical score. There's another "docudrama" film about Chess Records still in the editing stages witch was filmed entirely in Louisiana. I'm anxious to see how that movie will compare to this one.