The Swedish supergroup ABBA is mentioned several times throughout Unit4 of the 1st BAC "OUTLOOK" student's book. One of the sentences says that you can't have seen them in concert because they broke up in 1982. Well, that is not really true. Now you can recreate what a concert would be like updated to the XXIst century because you can watch a virtual concert of them in the ABBA Arena in London. Take a look at these videos below.
More about ABBA VOYAGE on a previous post on ClickOnEnglish.
Video WHY WE ALL LOVE ABBA?