How to bring Charli xcx's one-woman show – a triumph of emotive pop hedonism and discomfiting intimacy – to a sprawling, city-sized Worthy Farm? It was never going to be an easy task. Yet there have been few sets at this year's Glastonbury Festival more anticipated than Charli's Saturday night Other Stage headline slot.

Gracie Abrams — on Worthy Farm this weekend as a performer, also — was selected as the Grammy winner's "Apple" girl on Saturday night.