The expected single titled “Multi_Viral,” a collaboration between Puerto Rican hip hop group Calle 13 and Wikileaks’ Julian Assange, will be released next November 13, 2013 (yes, all 13s).

Last June, René Pérez, the group's frontman, visited Assange in the Ecuadorian embassy in London. Using the hashtag #JulianAssangeCalle13 they asked people to answer a series of questions through Twitter. These tweets are the material for the single for which Calle 13 collaborated with Rage Against the Machine guitarist Tom Morello and Palestinian vocalist and musician Kamilya Jubran, according to Billboard magazine.