Music is a key component of social movements. This article addresses the relationship between music and social movements through four foci: collective identity, free space, emotions, and social movement culture. Collective identity is developed and nurtured within free spaces through the use of music. These spaces are often rife with emotions that are instrumental in development of collective identity. A social movement culture may develop as these processes unfold. Music is part of this culture and serves as an important mechanism for solidarity when participants move beyond free spaces to more contested ones. Examples of song lyrics demonstrate these processes. Research on music and social movements, it is argued here, can be enhanced by addressing technology and popular culture.