Mariachi giving them modified shapes and tunings. In addition to instruments, the Spanish introduced the concept of musical groups—which, in the colonial period, generally consisted of two violins, a harp, and various guitars. This grouping gave rise to a number of folk musical styles in Mexico. One of these folk musical styles was the "son". This music featured string instruments. "Son" music divided into various regional varieties—the variety popular in the Jalisco area was called "son jalisciense", whose best known song, also referred to as "the mariachi national anthem," is “La Negra.” Modern mariachi music developed from this "son" style, with
Mariachi El Bronx (2009 album) performing "Cell Mates" in mariachi style under the name "Mariachi El Bronx". The punk rock album was released first, on November 11, 2008. Titled "The Bronx", it was their third eponymous album. The band supported it with a world tour from September through December 2008 covering Canada, the United States, Europe, the United Kingdom, Australia, and New Zealand, playing with bands such as Bad Religion, Every Time I Die, and Stick to Your Guns. In a December 2008 interview, singer Matt Caughthran commented that "["Mariachi El Bronx"] was something that was a part of us that we didn't really realize.