Participants learned foreign vocabulary by means of the paired-associates learning procedure in three conditions: (a) in silence, (b) with vocal music with lyrics in a familiar language playing in the background, or (c) with vocal music with lyrics in an unfamiliar language playing in the background. The vocabulary to learn varied in concreteness (concrete vs. abstract) and phonological typicality of the foreign words' forms (typical vs. atypical). When tested during and immediately after training, learning outcomes were poorer in the familiar language music condition than in the unfamiliar language music and silence conditions, but this effect was short-lived, as shown in a delayed test 1 week after training, on which the effect was no longer found. Learning outcomes were better for concrete words than for abstract words and better for typical foreign forms than for atypical ones. Contrary to the adverse effects of familiar language music, the effects of concreteness and typicality were lasting. We explain the interference effect in the familiar language music condition in terms of the workings of the phonological loop, a component of working memory involved in vocabulary acquisition (e.g., Gathercole & Baddeley, 1990).