Tracey Emin, one of the best-known contemporary British artists, has become a potent symbol of the relationship between art and celebrity in our time. Her now notorious installation My Bed was denounced by conservative critics as a scandal, but this and her other works have continued to attract ever larger audiences. Whether storming out of live television debates, talking about her abortions or modelling evening gowns for Vivienne Westwood, Tracey...