I agree with Stephanie about Beyonce. While she might be the biggest star in the world right now, or the hottest singer, her acting ability is modest. Her character in Dreamgirls gave off no vibe at all ~ pretty much dead in the water in a very boring movie that should have been so much more. There are probably better choices for the role.

A cameo for Diana and Joaquin Phoenix as Billy Dee are excellent ideas. Maybe at least Suzanne's assistant looks in here once in a while and could consider the ideas.