This is the official ABBA-channel on YouTube. ABBA, whose name is made up of the initials of the four members’ first names – Agnetha Fältskog, Björn Ulvaeus, Benny Andersson and Anni-Frid “Frida” Lyngstad – was one of the biggest pop groups of the 1970s. Forming in 1972, the Swedish band burst onto…