Roberta and Lisa grew up in Tucson, Arizona, learning to sing traditional Mexican music and developing their own brand of pop and roots rock. They separated after high school, but began performing together again in 1989, when Roberta sang background vocals for a band Lisa had formed.

After moving to Houston, they attracted interest from the country music establishment in Nashville but ultimately opted for an independent path, releasing their debut album, Ain’t No Perfect Diamond, on their own Luna Records label in 1997. Someplace Far Away From Here, another combination of English and Spanish songs, followed in 1999, and in 2002, now based in San Antonio, the sisters released their third album, Para Gloria, an all-Spanish-language set dedicated to their mother, Gloria.