found on albums). Maxi-singles usually contained four or more versions of a single song; i.e.: typically the '7-inch single', an 'album version', a shorter 'radio edit', and occasionally a 'club edit' or 'dance mix', and a '12-inch extended version'. Other options could include an 'a cappella' version, and / or an 'instrumental' version. Alternatively, some cassette singles contained differing versions of two different songs, as in a 'double A-side'. Popularity Although the cassette had reached a high level of popularity by the late 1970s, due to the ubiquity of mobile devices such as the Sony Walkman, the boombox, and car audio cassette players, cassette singles never rivalled gramophone records to even near the same extent as cassette albums had done. In the U.S., cassette singles were completely phased out by the mid 2000s. One reason for their lesser popularity was because they appeared to be an inefficient use of the media to consumers; a cassette single took up the same storage space as a full album. In April 2013, however, psychedelic rock band MGMT released the first single from their third album as a cassette single, and October 2014 saw the cassingle Great Big Happy Green Moonface from Polaris, the band's first release in fifteen years. In 2020 Lady Gaga released cassette singles for her songs "Stupid Love" and "Rain on Me" from the album Chromatica becoming her first single releases on the format. References Audio storage Single types Audiovisual introductions in 1980