“Blueberry Faygo” was expected to be the first single from Seattle rapper Lil Mosey in advance of his upcoming project, The Land of Make Believe. It was later added onto Mosey’s debut album, Certified Hitmaker, near the end of February 2020.

The song’s title is a reference to a flavor of Faygo, a soft drink company commonly referenced in hip-hop culture in relation to drug use, specifically, the abuse of lean and codeine.

While the song was never officially previewed by Mosey, it suffered a partial leak on June 5, 2019. In the months before the song officially released, the leak gained traction thanks to TikTok, and uploads of the leak saw millions of views across multiple platforms. However, the officially-released version of the track featured a new second verse which had only been briefly previewed by the verse’s recording studio.