Björn Ulvaeus & Benny Andersson

Guitarist/songwriter Björn Ulvaeus was half of the production duo that included fellow Swede Benny Andersson and produced the huge hits by '70s supergroup ABBA, best known for the number one pop single "Dancing Queen." Björn Christian Ulvaeus was born on April 25, 1945, in Gothenburg and began his performing career in a folk group. Producer Stig Anderson (who would later co-write "Dancing Queen") discovered them in 1963 and they moved to Stockholm. Anderson dubbed them the Hootenanny Singers and signed him to his label, Polar Records. Ulvaeus' song "Baby Those Are the Rules" w...