At first, Lyngstad was hesitant to perform with her boyfriend Benny Andersson, his best friend Björn Ulvaeus and his wife, Agnetha Fältskog. Their first project together in the winter of 1970–1971 was the cabaret act "Festfolket", which was not a success. The following year, Lyngstad toured with Lasse Berghagen, while the other three future ABBA members started performing together on a regular basis. Eventually, she rejoined the ensemble. Andersson and Ulvaeus were busy producing other artists, but soon discovered the qualities of Lyngstad's and Fältskog's voices combined; thus, the band was formed initially as Björn & Benny, Agnetha & Anni-Frid, later renamed ABBA.