A Tiempo (transl. "On Time") is the fourth studio album by American Latin pop duo Ha*Ash. It was released under the label Sony BMG on May 16, 2011. Recording sessions for the album was over a period of almost a year between Los Angeles, California and Milan, Italia. A Tiempo is a primarily a synth-pop sound and electric album, consisting mainly of stripped down instruments such as the synthesizers, piano and acoustic guitar. 　　Four singles were released from A Tiempo worldwide."Impermeable" was released as the lead single on March 21, 2011. The following singles "Te Dejo en Libertad", "Todo No Fue Suficiente" and "¿De Dónde Sacas Eso?". Ha*Ash promoted the album with a series of live performances and later embarked on A Tiempo Tour (2011).