The N-Dubz star is said to have been getting advice from the supermodel and plans to showcase his first line at London Fashion Week next year.
According to The Sun, a friend said: "Kate and her set have taken Fazer under their wing.
"As unlikely as it seems, they have formed a genuine friendship and have enjoyed many a night out together.
"She's got a great eye and she knows how to market things. There is even talk that she could feature in the ad campaign."
Fazer, who has apparently sampled Sting's 'Englishman in New York' on one of his new songs, is said to be planning a smart menswear collection similar to brands like Armani.
> Kate Moss: 'My daughter doesn't like when I wear make-up'