How many times has ABBA toured North America?

Agnetha, Björn Ulvaeus, Benny, and Anni-Frid are just four unassuming Swedes who happen to make up the acronym (and palindrome) ABBA.

Breaking out in 1974 as Sweden's first winner of the Eurovision Song Contest, the group has since become one of the best-selling of all time with over 400 million records sold worldwide — and counting.

Not only that, you can actually see them in concert right now, in London. Well, you can see holographic representations of them as they were in the '70s, but still, that's pretty damn cool.

If you're a U.S. fan of this musical powerhouse, how many times did you get a chance to see them on tour?

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