Avicii's parents said the move will allow them to concentrate on a foundation set up in their late son's name
Many fans were unaware the singer was in attendance until the show finished
It comes after record sales in 2021 were at the highest they’ve been in 30 years
Sawayama had an unexpected mutual friend with the Swedish pop group in Elton John
‘80s pop icon, with a penchant for ABBA and Tom Aspaul
The impromptu supergroup, rounded out by Nicole Lawrence, took to the stage during Coldplay’s fifth consecutive gig at Wembley Stadium
The Swedish icons competed against the late singer and actor at Eurovision 1974
The singer and 'Grease' actress had battled cancer since 1992
Brand new limited edition merch will also be available to pre-order soon
Elton John and ABBA's Benny Anderson have done a virtual collaboration on TikTok