Juana Rosario Molina Villafañe is an Argentine singer, songwriter and actress, based in Buenos Aires. She is known for her distinctive sound, considered an exponent of folktronica, although it has also been described as ambient, experimental, neofolk, chill-out, indietronica, psychedelic, indie pop, and progressive folk.

Un día is the fifth studio album by Argentine singer-songwriter Juana Molina. It was first released on 6 October 2008 by Domino Records. Sonically, the album is abstract and consists of layered loops. It received generally positive reviews from music critics.