Björn Ulvaeus
Björn Kristian Ulvaeus (born 25 April 1945) is a Swedish singer-songwriter and producer. He was a member of the Swedish musical group ABBA, and co-composer of the musicals Chess, Kristina från Duvemåla, and Mamma Mia! He appeared briefly in a comedy video made for the UK Eurovision Song Contest in 1974.
