If you're still planning your European vacation this summer, it's not too late to head to Stockholm for the new Abba Museum.
Yes, that's right – Benny Andersson, Bjorn Ulvaeus, Anni-Frid Lyngstad and Agnetha Faltskog - combined on the Swedish pop group that created songs like "Dancing Queen," "Knowing Me, Knowing You" and "Waterloo."
It was campy stuff – but catchy, too.
Abba began in Stockholm in 1972 and had a decade-long run in which they sold millions of records. They made the Rock and Roll Hall of Fame in 2010.