To backtrack, Halsey shared a clip of herself in the studio in which you can hear the BMTH vocalist and keyboardist in the background.
Sykes later shared a photo of himself and Halsey together, with his caption confirming their studio time together.
Then, a video clip surfaced of Sykes playing a clip of the song. Fans report the video came from Sykes Instagram Stories, but he later removed the video.
The short clip features just Halsey on vocals, with some fans wondering if this will be a song on her forthcoming album that was produced by Sykes and Fish.
Today, the musician posted a set of new photos shot on film of her hanging out in the studio with Fish, Sykes and YUNGBLUD.
You can see the collection of photos below.
What do you think will come out of all of this teasing from Halsey and Bring Me The Horizon? Let us know in the comments below.