Turkish Cypriot cities and towns regularly organise festivals that include performances of local and international singers and bands. Some Turkish Cypriot singers, such as Ziynet Sali and Işın Karaca, have achieved fame in Turkey. The Turkish Cypriot band Sıla 4 produced music that is considered essential for the Turkish Cypriot identity, and also acquired fame in Turkey. Rock and pop music are popular with the public in Northern Cyprus, important singers and bands include SOS and Fikri Karayel.