By the mid-late 1980s, glam metal had begun to become a major mainstream success in America with many of these band's music videos appearing on heavy rotation on MTV often at the top of MTV's daily dial countdown, and some of the bands appeared on the channel's shows such as "Headbanger's Ball", which became one of the most popular programs with over 1.3 million views a week. The groups also received heavy rotation on radio stations such as KNAC in Los Angeles.