"I was like 'Hey, you like jazz don't you?' and she was like 'Yeah, what are you thinking?'"
The full site split line-up posters have also been revealed
She sang intimate versions of 'All of Me' and 'Feeling Good' at one of the festival's famous jam sessions
Noah Kahan, Taylor Swift and The Weeknd are among the artists leading the UK run-downs
See her perform the new single as commuters speed by
The ambitious track sees the artist blend "different genres and sonic expressions" over seven minutes
The seven-minute-long piece is set to release this Friday (June 7)
Dave, Central Cee, KT Tunstall and Victoria Canal all snagged awards as well
Blur, Lankum, CMAT, PinkPantheress and more have also received nominations
Other acts on the huge bill include The Smashing Pumpkins, Duran Duran and Massive Attack