A list of real songs about fictional songs (e.g. "Jailhouse Rock")

[HMSGoose]

Hey, I once tried to start a bbs topic about this! Sweet Baby James and Obla-di Obla-da were the ones that set me off…

Songception

I was singing Sweet Baby James to my daughter just now and It occurred to me thst it’s a song within a song. The chorus is a song the protagonist is singing. Obla-di obla-da follows this pattern as well, as does Brandy, if you stretch the definition a bit. That’s all I could think of any others?