In a couple of weeks, Arcade Fire are going to hit us all in the head with their new album Everything Now, and they are in full promo-blitz mode right now. As part of that, the band paid a recent visit to BBC Radio 1’s Live Lounge. And as is the custom, the band took the opportunity to cover a fellow artist’s song. In this case, it was “Green Light,” the first single from Lorde’s triumphant new album Melodrama. (During the interview portion with the BBC’s Clara Amfo, AF frontman Win Butler thanked “our Lorde” for “fighting the good fight.”) Arcade Fire’s version of the song is a fired-up rocker with a lead vocal from Règine Chassagne and backing vocals from a youth choir. Watch that and “Everything Now” below.