The phenomenon is most concentrated among hip-hop stars - celebrity designing is all about relentlessly urban street fashion largely as defined by music videos. Anyone who saw the film 8 Mile, for example, knows what to expect from Eminem's line, Shady Ltd - plenty of sweatshirts with hoods, T-shirts bearing slogans with attitude, woolly hats, leather jackets and baggy jeans. For women, there tends to be more glamour and less material: miniskirts barely wider than a belt, slinky satin tops, a lot of Lycra and velour sweatsuits.