"Welcome" is an unreleased song by Cheat Codes featuring Billie Eilish
The song was likely recorded in January of 2016 in the same session as Vertigo, as Billie posted a photo on Facebook with the caption "makin bangers with Cheat Codes today..." on January 12, 2016.
A snippet was leaked on Dbree on February 28th, 2020.
Pretty little grin
When I've had enough
Welcome to the motherfuckin' chorus