In this paper we describe a preliminary, in-progress, research of fashion\trends in HCI. First, we present the motivation for this research, as this topic has not been methodically researched despite the accelerating pace and growing influence of fashion\trends in modern life. In order to provide appropriate theoretical background, we define and explain the fashion and trend phenomena using resources from multiple research disciplines such as trend, fashion, design research, sociology, psychology and economics. We have chosen to focus this research on web design trends; therefore we illustrate our approach with web design examples. We conclude with an outline of our research project, its goals and methods, and finally the potential implications and opportunities for future research.