Coyne also shared a snapshot of the twosome chatting about something during the recording session.
While the project is somewhat shrouded in mystery, Coyne did shed some light on what he's been working on with Cyrus and the Flaming Lips.
"At the moment we just sort of work on things as they come up, so part of this seems like something we're working on with Miley, but we're also working on it as a production. We make it as a song and then she gets added to it, we add more to it, and then she gets added to it again," he told Billboard. "I almost think it might be the series of songs that are Miley Cyrus songs, Flaming Lips songs on her record, then there's the series of the same songs on our record. Ours sound like the Flaming Lips and hers sound like Miley Cyrus, but they're the same songs."