ABBA was a Swedish Eurovision Song Contest-winning pop music group active between 1972 and 1982. The quartet was formed through the friendship of Benny Andersson and Bjrn Ulvaeus and also consists of Anni-Frid Lyngstad (usually known as Frida) and Agnetha Fltskog.They topped the charts worldwide from the mid-1970s to the early 1980s. The name -ABBA- is an acronym formed from the first letters of each of the group member-s given name (Agnetha; Bjrn; Benny; Anni-Frid). "Knowing Me, Knowing You" is a hit single recorded by Swedish pop group ABBA. The song was written by Stig Anderson, Benny Andersson and Bjrn Ulvaeus, with the lead vocal sung by Anni-Frid Lyngstad. During recording sessions it had the working titles of "Ring It In" and "Number One, Number One". "Knowing Me, Knowing You" features on the group's album Arrival, and the ABBA Gold: Greatest Hits compilation. The song has remained popular in the years since it was released, and became the catchphrase of Alan Partridge, Steve Coogan's comic creation from the show of the same name. "Knowing Me, Knowing You" is also featured in the Mamma Mia! musical. "Knowing Me, Knowing You" is most well known.