David Bowie's model wife IMAN used to boycott fashion shoots if she felt she was hired as the "token n**ger". The stunning African admits she's been subjected to racism throughout her career but when she discovered certain jobs were only offered to her because she was black, she refused to turn up. She reveals, "There was a hidden, unspoken rule that if you have, in an ad, three models one of them has to be black. Nobody said it, but it was an understanding. "I remember the first time when I was booked for something and I heard about that, I refused to take the job because I didn't want to perpetuate this token n**ger (thing). "They don't need a black model to fulfil a quota."