I'm quite insufferable about fitness, I suppose. I think it's really important, though I'm not a body nut.

Bethann Hardison has been my collaborator, my closest friend, we've gone through starting businesses, losing businesses, kids, divorces, marriages, and she was my maid of honor when I married my husband, David Bowie. And she's still such a part of my life. This is the person when it's totally dark, outside and inside, this is the person I would call.

One thing my mother always instilled in me is to always know my worth. Don't settle for less. She used to say to me 'Iman, no is a complete sentence, learn to say no. You don't have to explain it you don't have to say anything after it. It's a complete sentence.' So when I came to America 1975, I found out that the black models were being paid less than white models. So the first thing I did was say I'm not going to do the job unless I'm paid the same amount.

Your image as a model is your currency. That's the only thing you've got. No one cares what you look like in real life. Nobody is going to say the make up guy was terrible. They will say, you look awful and let's not book her again.

As a young girl, I was much more preoccupied by my flaws. Everyone teased me because of my long, skinny neck. To hide my so-called deformity, I was wearing a turtleneck when I was 3! Yet my neck is probably my best asset. At the end of the day, what counts is the entire package.

The commitment to give of yourself and the knowledge that the time is right are what's important. The thing is, I suppose, a younger person may not correctly divine the right time, because of lack of life experience, so the older woman may have the advantage of truly knowing if it's right or not.

I believe in glamour. I am in favor of a little vanity. I don't rely on just my genes. Looking good is a commitment to yourself and to others.