Lorde joined the worldwide Global Citizen Live event yesterday, performing ‘Solar Power’ and delivering a strong message on climate change.The charity gigs, which aim to “unite the world to defend the planet and defeat poverty,” took place in numerous cities across the world during a 24-hour broadcast and livestream yesterday (September 25).In the New York leg, Coldplay were the headliners, and were joined by Billie Eilish and Finneas to share a touching rendition of ‘Fix You’.Lorde opened up