Web 2.0 provides different platforms through which tourists can share text, photos and videos of their travel experiences. Consumer-generated media (CGM) are considered honest and are thus trusted more than marketer-generated content. Different factors account for why tourists adopt CGM. This study aims to review extant studies on CGM to identify the antecedents of CGM adoption for travel planning and the theories, models and frameworks used in these studies; it also seeks to analyze the strengths of these antecedents in predicting the adoption of CGM for travel planning. A total of 54 studies from 2005-2016 were found. The study found that distinct and heterogeneous theories and frameworks were used with 61 different antecedents to predict intentions. The technology acceptance model (TAM) was the most commonly used model. Trust predicted attitude more than the other antecedents. Implications and research directions are suggested.