"Knowing Me, Knowing You" is a song recorded by Swedish pop group ABBA, released in February 1977 as the third single from the group's fourth album, Arrival (1976). It was written by Benny Andersson, Björn Ulvaeus and Stig Anderson, with Anni-Frid Lyngstad singing the lead vocals. During recording sessions, it had the working titles of "Ring It In" and "Number 1, Number 1".
 "Knowing Me, Knowing You" was recorded in 1976 at the Metronome studio in Stockholm and was released as a single in February 1977, becoming one of the group's more successful hits. The B-side was "Happy Hawaii", an arrangement of another ABBA song, "Why Did It Have to Be Me?", but with a different lead vocalist and lyrics. "Knowing Me, Knowing You" was one of the early ABBA songs to deal with the break-up of a relationship. It predates the divorces of the ABBA members as well as further break-up songs to come: "The Winner Takes It All", "One of Us" and "When All Is Said and Done". Group member Benny Andersson named "Knowing Me, Knowing You" as one of ABBA's best recordings in a 2004 interview, along with "Dancing Queen", "The Winner Takes It All" and "When I Kissed the Teacher"[citation needed]. "Conociéndome, Conociéndote" is the Spanish-language version of the song. It was included in the compilation Oro: Grandes Éxitos released in 1993 and Gracias Por La Música released in 1980.
 "Knowing Me, Knowing You" proved to be one of ABBA's more successful singles, hitting #1 in West Germany (ABBA's sixth consecutive chart-topper there) and the United Kingdom, Ireland, Mexico and South Africa, and reaching the top 3 in Austria, Belgium, the Netherlands and Switzerland. It was a top 10 hit in Australia, Canada, France, New Zealand and Norway. In the United States, it became ABBA's sixth top 20 single, peaking at #14 on the Hot 100 and reaching #7 on Billboard's AC chart.
 In the UK, "Knowing Me, Knowing You" was one of the biggest singles of 1977. It also began a second run of three consecutive #1 singles for ABBA (followed by "The Name of the Game" and "Take a Chance on Me"), the group having had three consecutive #1 hit singles in 1976. As of September 2021, it is the group's third-biggest song in the country with 1.02 million chart sales, made up of pure sales and streams.
 By September 1979 in West Germany "Knowing Me, Knowing You" had sold over 300,000 copies.
 Billboard reviewed the song and described it as a "melodically energetic but sad worded ditty about a romantic breakup."  Cash Box called it "a softly rocking record that combines memorable pop hooks in their distinctive reverb-soaked ambiance" and said that it has "a sound agreeable to just about any top 40 station." Record World said that "Its chorus is a mighty hook, capping another superb melody."
 "Knowing Me, Knowing You" continues to be regarded as one of ABBA's finest songs. In 2017, Billboard ranked the song number four on their list of the 15 greatest ABBA songs, and in 2021, Rolling Stone ranked the song number two on their list of the 25 greatest ABBA songs.
 The music video for "Knowing Me, Knowing You" depicts the band against various colored backdrops singing while facing each other, turning away as a new line is sung. At the end of the video, the band's female members are seen walking away through thick snow. The video was directed by future Academy Award nominee Lasse Hallström, and most other videos of the band were directed by him.
  
 ^ Shipments figures based on certification alone.