With more than 15 million views for the official a cappella "Africa" performance video since its publishing on YouTube in May 2009 until September 2013 that earned them kudos from the song's co-writer, David Paich, Perpetuum Jazzile is the group from Slovenia that is internationally most listened online. Other Slovenian bands include a historically progressive rock ones that were also popular in Titoist Yugoslavia, such as Buldožer and Lačni Franz, which inspired later comedy rock bands including Zmelkoow, Slon in Sadež and Mi2. With exception of Terrafolk that made appearances worldwide, other bands, such as Avtomobili, Zaklonišče Prepeva, Šank Rock, Big Foot Mama, Dan D, and Zablujena generacija, are mostly unknown outside the country. Slovenian metal bands include Noctiferia (death metal), Negligence (thrash metal), Naio Ssaion (gothic metal), and Within Destruction (deathcore).