Now from bagpipes to tango. Kind of an unlikely move, but this isn't your traditional tango. It's tango with a bit of electronica, rock, and hip-hop.

It's by the group Bajofondo.

Band leader and composer Gustavo Santaolalla started his career as a rocker.

He likes to call Bajofondo contemporary music from his native Argentina and neighboring Uruguay.

Guastavo Santaolalla is best known in the States for his Oscar winning soundtracks for Brokeback Mountain and Babel.

Now in a sense he's going back to his South American roots.

SANTAOLALLA: When we started to do this project we knew we were stepping on sacred ground and that we were exposing ourselves to criticism from the tango traditionalists and people who do electronic music or rock. But the reality is that we've been embraced by the people. And that's a big, big achievement.

WERMAN: Your album features a number of unexpected voices including Elvis Costello and Nelly Furtado.

SANTAOLALLA: There's a saying in Spanish that goes "paint your village and you will paint the world." So, we try to expand those horizons and collaborations. We feel that there's a universal, cosmic, tango vibe that lots of artists have and maybe they don't even know about it, but they connect to the world of tango. I think there's a connection in their art to darkness, passion, to melancholy that's very similar to the way that tango approaches those emotions. And I think Elvis Costello definitely has that. His vibrato is a very tango kind-of vibrato. So we wanted to explore that and the collaboration with Costello gave us that opportunity.