Mujer contra mujer (pronounced [muˈxɛɾ ˈkõntɾa muˈxɛɾ]; Spanish for "woman against woman") is the second and final studio album by the pop duo formed by Argentine singers Sandra Mihanovich and Celeste Carballo, released by RCA Records and Sony BMG in October 1990. Mihanovich and Carballo had already developed successful solo careers before joining as a duo. After collaborating on a successful show in the summer of 1987, they decided to record together and released their first studio album as a duo, Somos mucho más que dos, in 1988. Around this time, Mihanovich and Carballo became romantically involved, although not publicly. Their songs included subtle references to lesbian love, and the nature of their relationship caused much speculation in the media. Before forming the duo, Mihanovich a