Songs about other musicians

Pee Shy - "Jad Fair"

Cat Power, "Song to Bobby"

William Butler Yeats in jeans
Got up to play guitar and sing
In some joint in Mission Beach last night
At the door sat Tom Waits
In a porkpie hat and silver skates
Jugglin' three collection plates, Jesus Christ

Townes Van Zandt standin' at the bar
Skinnin' a Hollywood movie star
And he can't remember where he parked his car
Or to whom he lost the keys
Full of angst and hillbilly haiku
What's a poor Ft. Worth boy to do
Go on rhyme somethin' for em' man
Show him how you really feel

--Guy Clark, but I like James McMurtry's version:

https://www.youtube.com/watch?v=-jwuzD-OHFE

https://www.youtube.com/watch?v=nysF0cVlF4A

Wiley - P Money

I can't think of another song bigging someone up who's part of the same scene