Hot Hits was a radio format created by consultant Mike Joseph in the 1970s. That concept, which helped spur the birth of what is now known as CHR, also revitalized the Top 40 format and would play a role in bringing the format to the FM band throughout the 1980s. The concept was to play only the current hits on the Top 30 (or Top 50 on some stations) and no recurrents (that is, recent hits which had already finished their run on the charts) or oldies whatsoever (unless they happened to be cuts on current chart albums).