Bad is the seventh studio album by American recording artist Michael Jackson. The album was released on August 31, 1987 by Epic/CBS Records, nearly five years after Jackson's previous studio album, Thriller, which went on to become the world's best-selling album. Bad itself has sold between 30 to 45 million copies worldwide, shipped 8 million units in the United States alone, and has been cited as one of the best selling albums of all time. The album produced five Hot 100 number ones, the first album to do so. Similar to Jackson's previous music material, the album's music features elements of R&B, pop and rock.

Bad was recorded during the first half of 1987. The lyrical themes on the record relate to paranoia, romance and self-improvement. Bad is widely regarded as having cemented Jackson's status as one of the most successful artists of the 1980s, as well as enhancing his solo career and being one of the best musical projects of his career. Nine of the eleven songs on Bad were released as singles; one was a promotional single and another was released outside of the United States and Canada. Five of the singles hit number one in the United States, while a sixth charted within the top-ten, and a seventh charted within the top-twenty on the Hot 100. The single that was released outside of the United States and Canada was commercially successful, charting within the top ten and top twenty in multiple territories. Bad peaked at number one in seven countries, as well as charting within the top twenty in other territories. The only song on the album which wasn't released as a single nor had a music video for was "Just Good Friends".

Bad or BAD may refer to:

An album may be understood as a collection of recordings, released as a single package on gramophone record, cassette, compact disc, or via digital distribution, however the concept is found in printed music dating into the early nineteenth century in works by composers such as Schumann and Mendelssohn. The word derives from the Latin word for list.

Today, with the vinyl record no longer being used as the primary form of distribution, the term "album" can still be applied to any sound recording collection, such as those on compact disc, MiniDisc, Compact audio cassette, and digital or MP3 albums.Cover art is also considered an integral part of the album. Many albums also come with liner notes and inserts giving background information or analysis of the recording, reprinted lyrics, images of the performers, or additional artwork and text. These are now often found in the form of CD booklets.

Vinyl LP records have two sides, each comprising one half of the album. If a pop or rock album contained tracks released separately as commercial singles, these were often traditionally placed in particular positions on the album. A common configuration was to have the album led off by the second and third singles, followed by a ballad. The first single would lead off side 2. In the past many singles (such as the Beatles' "Hey Jude" and Bob Dylan's "Positively 4th Street") did not appear on albums, but others (such as the Beatles' "Come Together" and Dylan's "Like a Rolling Stone") were part of an album released concurrently. Today, many commercial albums of music tracks feature one or more singles, which are released separately to radio, TV or the Internet as a way of promoting the album. Albums have also been issued that are compilations of older tracks not originally released together, such as singles not originally found on albums, b-sides of singles, or unfinished "demo" recordings.