4ÆM is a song Grimes teased on June 5, 2018 on Grimes her Twitter account. She described the song as her ethereal chav jam which is a cyberpunk interpretation of the Bollywood film Bajirao Mastani. The song is from the film’s main character, Mastani, her perspective.

Art Angels is the fourth studio album by Canadian recording artist Grimes; it is scheduled to be released digitally on November 6, 2015 by 4AD and physically on December 11, 2015. Its lead single "Flesh without Blood" was released on October 26, 2015 alongside the preorder of the parent record.