Prior to their collaboration, All Time Low and Avril Lavigne had already joined forces in 2022 when they performed a cover of Blink-182's "All The Small Things" during their set at the When We Were Young festival.

[8] Gaskarth describes it as an anthem about cutting ties with people and things that hinder personal progress, symbolizing a departure from the past and a fresh perspective on the future.

[6] "Fake As Hell" was received positively upon release by critics; with Mary Varvaris of The Music describing the song as " a three-minute pop-punk anthem about “recognizing what’s real and saying goodbye to what’s not".

[10] Cillea Houghton of American Songwriter, praised the artists' vocal performance in the song by calling them "strong voices that were made for each other, making for a natural collaboration".

[12] All Time Low also opened for the first part of the North American leg of Lavigne's Greatest Hits Tour in May and June 2024, where the song was performed together during her set.