Guidance: Contains Flashing Images. Lorde performs Green Light at Glastonbury 2017. Watch Lorde’s 2017 Glastonbury set on demand on BBC iPlayer: Watch Glastonbury performances from throughout the years on BBC iPlayer: Listen and download your favourite Glastonbury sets on BBC Sounds: Dig deep in to performances, articles, photos and more at: Follow all the action via @bbcglasto
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