With the hit movie musical "Mamma Mia!" just released, based upon the light-as-air '70s pop tunes by ABBA, what do you really know about the Swedish group that existed for only a decade (1972-82) but ...

So rarely does a band come along that is so extraordinary that it becomes something wholly greater than itself. After 50 years of chart-topping albums, world tours, and an enduring fanbase, ABBA is no ...

Agnetha. Björn. Benny. Anni-Frid. All four are superstars in their own right, but when they came together in 1972 to form Swedish supergroup ABBA, they changed the world of music forever. The group — ...