Throughout society there are instances of seemingly irrational imitative behavior, or fads.  Everyone can identify a fad when they see one yet there is no comprehensive economic theory about their origins.  
There are several theories that discuss why people replicate the choices of other agents in the economy,
but none that are specific to the lifecycle of a fad.  We present a model that analyzes the interaction of several types of agents in a complex market environment, from the initial product choice, through the period of peak popularity, to the eventual demise of the fad.  Using agent-based modeling techniques, we obtain a pattern of acquisition and liquidation of commodities that is consistent with the observed lifecycle of a fad.  The agents are autonomous and heterogeneous.  There are two main subsets of agents, Fad Setters and Fad Followers, with different rule sets.  Each of the individual instances of the agents in each subset has its own location and initial good.  They exist on a spherical surface, over which they can search for other agents, interact with agents they find, and make purchases.  This allows a model of the lifecycle of the fad to evolve.