"¡Ay, ay, ay!", subtitled "Reminiscencias cuyanas", is a song composed in 1913 by the Chilean-born composer, pianist, singer and publisher Osmán Pérez Freire. Freire, who emigrated to Mendoza, Argentina in c.1886-1890, was a figure of some note in the evolution of Tango. This song, however, known worldwide, is his most famous composition, and has never fallen out of fashion. It is equally suited to intimate performance with guitar or piano accompaniment, or to large-scale concert delivery with orchestral accompaniment, and has been sung by almost everyone, and especially favoured by some of the most famous tenors, since it was first written.