Natasha Khan has hinted at a surprise release via a virtual game of hangman
Lorde curated the soundtrack, which also features Kanye West, Charli XCX and more
The track is taken from a new compilation called 'Body Of Songs'
The pair last collaborated on 2010's Twilight: Eclipse soundtrack
Bat For Lashes star made her directorial debut with the video for the single, which stars actress Saoirse Ronan
Singer also tells the crowd, 'Hopefully I'll be back with another record soon'
The track is being released on limited edition 7" on July 1 on Dan Carey's label Speedy Wunderground
Natasha Khan played her own low-key version of the song on Zane Lowe's Radio 1 show
'This record definitely made me bleed for it,' says singer of forthcoming third album