For the 2004 semi-final of the Eurovision Song Contest in Istanbul , thirty years after ABBA had won the 1974 contest in Brighton , UK , Ulvaeus appeared briefly in a special comedy video made for the interval act , entitled " Our Last Video " . Each of the four members of the group appeared briefly in cameo roles , as did others such as Cher and Rik Mayall . The video was not included in the official DVD release of the Eurovision Contest , but was issued as a separate DVD release . It was billed as the first time the four had worked together since the group split . In fact , they each filmed their appearances separately
1974 contest
Eurovision Song Contest 1974
Björn Ulvaeus