By 1978, ABBA were one of the biggest bands in the world.
They converted a vacant cinema into the Polar Music Studio, a state-of-the-art studio in Stockholm.
The studio was used by several other bands; notably Genesis' Duke and Led Zeppelin's In Through the Out Door were recorded there.
During May 1978, the group went to the United States for a promotional campaign, performing alongside Andy Gibb on Olivia Newton-John's TV show.
Recording sessions for the single "Summer Night City" were an uphill struggle, but upon release the song became another hit for the group.
The track would set the stage for ABBA's foray into disco with their next album.

On 9 January 1979, the group performed "Chiquitita" at the Music for UNICEF Concert held at the United Nations General Assembly to celebrate UNICEF's Year of the Child.
ABBA donated the copyright of this worldwide hit to the UNICEF; see Music for UNICEF Concert.
The single was released the following week, and reached number-one in ten countries.
By 1978, ABBA were one of the biggest bands in the world. They converted a vacant cinema into the Polar Music Studio, a state-of-the-art studio in Stockholm. The studio was used by several other bands; notably Genesis' Duke and Led Zeppelin's In Through the Out Door were recorded there. During May 1978, the group went to the United States for a promotional campaign, performing alongside Andy Gibb on Olivia Newton-John's TV show. Recording sessions for the single "Summer Night City" were an uphill struggle, but upon release the song became another hit for the group. The track would set the stage for ABBA's foray into disco with their next album.
On 9 January 1979, the group performed "Chiquitita" at the Music for UNICEF Concert held at the United Nations General Assembly to celebrate UNICEF's Year of the Child. ABBA donated the copyright of this worldwide hit to the UNICEF; see Music for UNICEF Concert. The single was released the following week, and reached number-one in ten countries.
ABBA