Musical hallucinations (MH) are probably more frequent in the elderly than those reported in the literature. We will illustrate the clinical findings of MH with 3 personal cases. The differential diagnosis and the diagnostic tools relevant in clinical practice will be presented as well as the pathogenesis of deafferentiation-induced MH. MH can be considered as a phenomenon of neuronal plasticity and also serve as a model to understand neuronal networks involved in mental representation of music and hallucinations in general.