A greatest hits album, sometimes called a "best of" album or a catalog album, is a compilation of songs by a particular artist or band. Most often the track list contains previously released recordings with a high degree of notability. However, to increase the appeal, especially to people who already own the original release, it is common to include remixes or alternate takes of popular songs; sometimes even new material (previously unreleased) will function as bonus tracks. At times, a greatest hits compilation is the original album release for songs that have been released as singles and charted successfully. Many of these albums surface despite the unwillingness of original artists to support them, the songwriters being embroiled in fighting record company decisions. Despite The Rolling Stones' conflicts over the control of their tracks, the band-opposed Hot Rocks 1964–1971 surfaced in December 1971, and the contentious legal issues failed to clip the wings of the record's commercial success. Nonetheless, many other of these albums actually receive detailed co-operation from the musicians involved, which can mean trying to present a specific 'goal' or 'sound' in the work (roughly akin to that in concept albums)..