Björn Ulvaeus & Benny Andersson

Björn Ulvaeus & Benny Andersson are the BB in ABBA, one-time husbands of Agnetha Fältskog and Anni-Frid Lyngstad respectively. Björn started his career in Swedish folk group Hootenanny Singers, and Benny in the beat group The Hep Stars. They wrote their first song together in June 1966, "Isn't It Easy To Say", which was recorded by the Hep Stars.