As far as I know, there isn't a thread about this yet. When music talks about itself.
Music about music (could it be called
metamusic?).
I guess there are examples from all styles. But, right now, rock songs come to mind.
Four classics.
Bob Seger:
Old Time Rock 'n Roll.
Chubby Checker:
Let's Twist Again.
Elvis Presley:
Jailhouse Rock.
Bill Haley:
Rock Around the Clock.
Other styles. Disco.
The Village People:
Can't Stop the Music.
More examples? Other genres?