An AU where everyone including your Pop OCs are different singers/artists and they sound just like them!
Here's what I have so far:
Anne as Anne-Marie
Speedy as Lauv
Octavian as Calum Scott
Fab as Adele or Meghan Trainor
and Red as Ariana Grande (could change but this should do)
This is just a random idea I thought about, but you can try it if you want! ^^