"Vertigo" is an unreleased song by Cheat Codes featuring Billie Eilish. It had a snippet leaked on February 22nd, 2020. It is also registered on BMI Repertoire.
Lets take a ride downtown
The song was likely recorded in January of 2016 in the same session as Welcome, as Billie posted a photo on Facebook with the caption "makin bangers with Cheat Codes today..." on January 12, 2016.