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''Achtung Baby'' is the seventh studio album by rock band U2. It was produced by Daniel Lanois and Brian Eno, and was released on 19 November 1991 on Island Records. Stung by the criticism of their 1988 release ''Rattle and Hum'', U2 shifted their musical direction to incorporate alternative rock, industrial, and electronic dance music influences into their sound. Thematically, the album is darker, more introspective, and at times more flippant than the band's previous work. ''Achtung Baby'' and the subsequent multimedia-intensive Zoo TV Tour were central to the group's 1990s reinvention, which replaced their earnest public image with a more lighthearted and self-deprecating one.
Seeking inspiration on the eve of German reunification, U2 began recording ''Achtung Baby'' in Berlin's Hansa Studios in October 1990. The sessions were fraught with conflict, as the band argued over their musical direction and the quality of their material. After weeks of tension and slow progress, the group made a breakthrough with the improvised writing of the song "One". They returned to Dublin in 1991, where morale improved and the majority of recordings were completed. The album's title and colourful multi-image sleeve were chosen to confound expectations of U2 and their music.
''Achtung Baby'' is one of U2's most successful records. It earned favourable reviews and debuted at number one on the US ''Billboard'' 200 Top Albums, while topping the charts in many other countries. It spawned five hit singles, including "One", "Mysterious Ways", and "The Fly". The album has sold 18 million copies worldwide and won a Grammy Award in 1993 for Best Rock Performance by a Duo or Group with Vocal. One of the most acclaimed records of the 1990s, ''Achtung Baby'' is regularly featured on lists of the greatest albums of all-time. - Wikipedia