Aquemini is the third studio album by American hip hop duo Outkast. It was released on September 29, 1998, by LaFace Records. The title is a portmanteau of the two performers' Zodiac signs: Aquarius (Big Boi) and Gemini (André 3000), which is indicative of the album's recurring theme of the differing personalities of the two members. The group recorded the majority of the album in Bobby Brown's Bosstown Recording Studios and Doppler Studios, both in Atlanta, Georgia.
Released as the follow-up to the duo's 1996 album ATLiens, Aquemini expands on the previous record's outer space-inspired compositions by incorporating live instrumentation. The commercial success of ATLiens allowed for more creative freedom for the group, which led to the members self-producing the majority of the tracks. The band employed a large number of musicians for the album, who frequently entered and exited the studio throughout the recording process and had a major influence on the writing development of the album's songs. Lyrically, Aquemini explores various themes including human nature, addiction, and interpersonal relationships.
Aquemini was certified platinum in November 1998, only two months after its release, and was certified double platinum on July 2, 1999, by the Recording Industry Association of America (RIAA). It peaked at number two on both the Billboard 200 and the Top R&B/Hip-Hop Albums chart. Four of the album's tracks had already or would later become singles, although some were limited (promotional) releases and not available commercially. The record also received rave reviews from music critics, who praised the album's musicality and unique lyrical themes. Five years after its release, it made it into Rolling Stone's list of the 500 Greatest Albums of All Time, being ranked at number 500. In a 2020 updated list, it was ranked at number 49.