occupation isak n jiyeon
SM Town ( stylized as SMTOWN ) is the umbrella name for the recording artists under South Korean ___MASK38___ company S . M . ___MASK38___ . Isak N Jiyeon (  N  ) was a Korean female duo formed by SM ___MASK38___ in 2002 that has since been disbanded . Jiyeon was involved in SM ' s project named The Grace , a four - member Korean girl group that sings , dances and acts . Isak was featured in the SM Town albums and videos and continued to do a variety of work , such as being DJ and VJ for Arirang TV , MC work for various networks , and taking on small acting roles on network television . A girl group is a music act featuring several female singers who generally harmonize together . The term " girl group " is also used in a narrower sense in the ___MASK49___ to denote the wave of American female pop music singing groups , many of whom were influenced by doo - wop , and which flourished in the late 1950s and early 1960s between the decline of early rock and roll and start of the British Invasion . The British Invasion was a phenomenon that occurred in the mid - 1960s when rock and pop music acts from the ___MASK34___ , as well as other aspects of British culture , became popular in the United States , and significant to the rising " counterculture " on both sides of the Atlantic . Pop and rock groups such as the Beatles , the Dave Clark Five , the Kinks , the Rolling Stones , Herman ' s Hermits , and the Animals were at the forefront of the invasion . S . M . ___MASK38___ is a South Korean ___MASK38___ company established in 1995 by Lee Soo - man . It is currently one of the largest ___MASK38___ companies in South Korea . The company operates as a record label , ___MASK87___ agency , music production company , event management and concert production company , and music publishing house . Doo - wop is a genre of music that was developed in African - Americans communities of New York City , Philadelphia , Chicago , Baltimore , Newark , Pittsburgh , Cincinnati , Detroit , Washington , D . C . and Los Angeles in the 1940s , achieving mainstream popularity in the 1950s and early 1960s . Built upon vocal harmony , doo - wop was one of the most mainstream , pop - oriented ___MASK100___ & B styles of the time . ___MASK53___ Bill Kenny ( 1914  1978 ) is often called the " Godfather of Doo - wop " for his introducing the " top and bottom " format which featured a high tenor singing the lead and a bass ___MASK53___ reciting the lyrics in the middle of the song . Doo - wop features vocal group harmony , nonsense syllables , a simple beat , sometimes little or no instrumentation , and simple music and lyrics .