The megaphone effect refers to the fact that the web makes a mass audience potentially available to ordinary consumers. The article focuses on fashion bloggers who acquire an audience by iterated displays of aesthetic discrimination applied to the selection and combination of clothing. The authors offer a theoretical account of bloggers' success in terms of the accumulation of cultural capital via public displays of taste and describe how the exercise of taste produces economic rewards and social capital for these bloggers. The article situates fashion blogging as one instance of a larger phenomenon that includes online reviews and usergenerated content and extends to the consumption of food and home decor as well as clothing. In these instances of the megaphone effect, a select few ordinary consumers are able to acquire an audience without the institutional mediation historically required.A new kind of consumer behavior has emerged online in the past decade. The web has made it possible for ordinary consumers to reach a mass audience, to "grab hold of the megaphone," to adapt Bourdieu's (1999) metaphor. More consumers now have more opportunities to reach thousands of other consumers than ever before. This novel phenomenon has not yet received much theoretical attention. We draw on Turner's (2010) idea of a "demotic turn" in contemporary culture to situate blogs and other means whereby ordinary consumers take hold of the megaphone, and then we develop Bourdieu's idea of cultural capital to explain the processes whereby a select few ordinary consumers acquire a mass audience. Edward F. McQuarrie (emcquarrie@scu.edu) is professor of marketing, Santa Clara University, Santa Clara, CA 95053. Jessica Miller ( jlmiller@ smu.edu) is a graduate student in the Temerlin Advertising Institute, Southern Methodist University, Dallas, TX 75205. Barbara J. Phillips (bphillips@ edwards.usask.ca) is Rawlco Scholar in Advertising and professor of marketing,