Classic hits is a radio format which generally includes songs from the top 40 music charts from the mid-1970s to the 2000s, with music from the 1980s serving as the core of the format. Music that was popularized by MTV in the early 1980s and the nostalgia behind it is a major driver to the format. It is considered the successor to the oldies format, a collection of top 40 songs from the late 1950s through the late 1970s that was once extremely popular in the United States. The term is sometimes incorrectly used as a synonym for the adult hits format, which uses a slightly newer music library stretching from all decades to the present with a major focus on 1990s and 2000s rock and alternative songs. In addition, adult hits stations tend to have larger playlists, playing a given song only a