Mamma Mia!

Abba’s genius was never to write a happy love song

Memories. Good days. Bad days. In 1992, U2 mounted their Zoo TV tour. U2 being U2, the gigs were over-earnest affairs, their showbiz razzmatazz never emulsifying with their agitprop posturing. But disbelief was colloidally suspended the night the show hit Stockholm – and U2 were joined on stage by Benny Andersson and Björn Ulväeus for a cover of ‘Dancing Queen’. In truth, that evening’s take on one of Abba’s meisterwerke was a lumpen affair. Bono had to drop his voice an octave for what ought to be the song’s soaring refrain. And while Björn looked happy enough strumming a few chords on an acoustic guitar, Benny, at a keyboard the