The list of music considered the worst consists of albums or songs that have been considered the worst music ever made by various combinations of music critics, television broadcasters (such as MTV), radio stations, composers, and public polls. A piece of music needs to have been notable, popular, or memorable to be deemed the "worst ever", or it would be unlikely to top all-time public polls a few years after it was released. As such, a piece usually needs to have had a high-profile at the time of its release, such as an unexpected hit that was highly disliked outside of its fanbase, albums with poor material or songs that are most disappointing by artists. Scholarly accounts of the "worst music ever" are rare. Most polls or critical lists are light-hearted in nature, especially in pop music. Magazines reflect the preferences of their readers, and if polls are influenced by too small a group of readers or critics, they provide unreliable results. Most "worst ever" lists do not aim to take into account all music ever created, but are limited to certain time periods, styles of music, and geographical areas. Furthermore, individual tastes can vary widely, to the point where very little consensus on a worst song can be achieved; the winning song in a CNN e-mail poll received less than 5 percent of the total votes cast. There are a handful of scholars who have done more in-depth analysis of music perceived to be bad, including Irwin Chusid, Barry Hansen (better known by the stage name Dr. Demento) and Darryl W. Bullock, author of the 2013 book The World's Worst Records.
Due to their longer playing time than songs, albums contain material that most people, apart from fans and professional critics, will not have heard and have serious flaws. Therefore, "worst-ever" lists usually contain poorly recorded albums that many readers or viewers have not heard in their entirety, or the "worst" or most disappointing albums by well-regarded artists. An artist's actions or reputation might also influence the results. Such lists are harder to compile in the form of a public poll, unlike singles or music videos, which will usually have been heard or seen even by non-fans of the artist.