Songfacts®:

• The title of this track comes from a soft drink shout out on the chorus:
  
  Three more millions when you ask how my day go
  Poured up a 4, now that blueberry Faygo
  
  Faygo is a Detroit-based soft drink company whose flavored soda pop is one of the ingredients often used when creating the recreational drug lean.
• "Blueberry Faygo" first leaked online in 2019 and Lil Mosey's fans began uploading a series of fake bootlegs on streaming services with such titles as "Blueberry Fweigo" and "Burberry Faygo." There was huge anticipation for the song by the time it was officially released on February 7, 2020.
• Millions of TikTok users downloaded the song prior to its release. This is surprising as "Blueberry Faygo" contains hardcore lyrics that, as well as espousing drug taking, also include plenty of explicit references to the rapper's sexual activity. Sonically, it is a breezy, catchy tune, which probably explains why it blew up on the youth-orientated app.
• Seattle beatmaker Callan produced the track. He based his production around a squashed sample of Johnny Gill's 1990 R&B single "My, My, My."
  
  "I'm happy that a generation is still inspired by and learning from this work that we did so long ago," Gill told Rolling Stone. "It keeps your name in the mix."