This article argues for the prematurity of any dismissal of the notion of authenticity as meaningful within popular music discourse. It synthesises a range of views as to how authenticity is constructed, and offers a tri-partite typology dependent on asking who, rather than what, is being authenticated. It focuses on rock and folk genres, but also argues that the generic nature of the typology makes it applicable to any other genre wherein listeners are concerned to ask whether a musical utterance can be construed as sincere.