The idol phenomenon began during the early seventies, reflecting increasingly materialistic and richer Japanese youths. Teenage girls, mostly between 14 and 16, began rising to stardom. One in particular, Momoe Yamaguchi, was a huge star until her marriage and retirement in 1980. Idols dominated the pop music scene in the 80s; and this period is known as the “Golden Age of Idols in Japan”. In a single year, as many as 40 or 50 new idols could appear, only to disappear from the public spotlight shortly afterwards. A few idols from that era, such as Seiko Matsuda, are still popular. In the 90s, the power of Japanese idols began to wane, as the music industry shifted towards rock musicians and singers for whom music was a more important sales point than looks or wholesomeness, as well as towards genres such as rap that were harder to square with conventional prettiness. The Japanese idol phenomenon has had a large impact on popular culture in Hong Kong and Taiwan.