They’re famous for their marriages, divorces, and impossibly perfect pop songs.But how much do you really know about ABBA?In this series, Sara Cox is your guide to Sweden’s biggest musical export.When Benny, Bjorn, Agnetha and Anni-Frid won the 1974 Eurovision Song Contest, their lives changed forever. But that win didn’t come easy.Because the road to Waterloo is a long one. It took years of hard work, and the combination of four world-class talents - each of them already successful in their own right - to pull it off.Through the BBC’s archive and new interviews with experts and insiders - as well as the group’s timeless back catalogue - you’ll get to know ABBA like never before.