We wanted to make sure that the film covered the main issues of his life. Musicianship, appearance.

He was very concerned about his children potentially being kidnapped or attached, and that's why they were covered up. When he went to Berlin zoo, there were 200 photographers.

And you are, every day, relentlessly terminating that life. And you are happy with that?

What I wanted to make sure of is that I wasn't just tagged as a Viner.

The first time I ask him, have you had your cheekbones raised, have you had your nose changed? He denied it all. I was asking him to compare his face with what it looked like years ago.

I make sure everything's covered to make sure everybody's safe.