Happy ABBA-versary! Fans mark 50 years since 'Waterloo' took the world by stormFans are celebrating 50 years since ABBA won a major battle with โWaterloo.โ.
Stars and royalty watch ABBA's return in digital stage showFour decades after ABBA last performed live, audiences can once again see them onstage, in the innovative digital concert "ABBA Voyage."