It was around this time of the year in 1974 that ABBA performed Waterloo at the Eurovision Song Contest in Brighton's Grand Hotel.
They went on to win, the song became a chart topping hit - and the rest, as they say is history.
Someone who has more insight into the band than most is Jimmy Barnett.
Jimmy was Light Director & Productions Manager for the band's live concerts from 1977 until 1980.
Jimmy reminisces with Jesse about working with the Swedish quartet.