John Travolta's First Hit   John Travolta first gained fame as Vinnie Barbarino on the television series Welcome Back, Kotter (1975).
popular adjective (LIKED) A2 liked, enjoyed, or supported by many people: She's the most popular teacher in school. That song was popular with people from my father's generation. Walking is a popular form of exercise in Britain.
Not an easy question, as the delimitation of music genres can be very tricky ! Especially pop, which can also be understood as the adjective popular according to the context. - it comes from rock'n roll, which at first was basically blues with a faster tempo. - it is a hybrid type of music.