I watched this yesterday with ds and found Madonna's voice so unpleasant. She had one tone all the way through. Yuck. David Bowie wasn't much better. Why not just get proper ACTORS to do these jobs - they are often really good at acting!!
And isn't it a little pervy to have Madonna aged 40 whatever and a little boy sort of in love with her. I mean I know that it's fiction and all that but still, yuck, it so didn't work for me!