"Princes of the Universe" was written specifically for the Highlander movie, so it's fitting.
Jay-Z's nickname Hova/Hov comes from Jehovah, a name for God in the Hebrew Scriptures.
Rakim was calling himself (and being called by others) God long before him. Canibus also claimed that the fact that he wasn't worshiped seemed absurd to him.
Regal Pinion's song, "Clockwork Seraph" has shades of this. His song "Kafkaesque" the narrator says this verbatim, then again seeing as the song is from the perspective of the Big Bad in Final Fantasy VI, this can be expected.
In The Who's Tommy, the title character doesn't so much believe he's God as believe that he's the Messiah, and the trope is subverted in that his followers ultimately reject him, but "Sensation" contains the following lyrics:
Glinda and Elphaba call each other out in this in "Defying Gravity":
I hope you're proud how you would
Grovel in submission
To feed your own ambition
Can't I make you understand?
You're having delusions of grandeur
A couple of songs by Innerpartysysten invoke this trope;
The road I walk is paved in gold
To glorify my platinum soul
I am the closest thing to God
So worship me and never stop
I've got this planet in my hands
You know I'll waste it if I can
Deify by Disturbed: Or rather "A god you are not!"
It seems so clear now what I must do, You're no immortal
I won't let them deify you
They view you as the new messiah
Deify you. Renew belief in some demented man
The pharaoh in The Dark Eternal Night by Dream Theater declares that he is a god.
I am the last
Born of the blood of the pharaohs
The ultimate god of a rotting creation
Sent to unleash this curse
Between the Buried and Me, a Progressive Death Metal band from North Carolina, wrote an entire Concept Album based around two characters— one of which believes himself to be a god. This is especially made obvious in "Augment of Rebirth"
To create. To recreate.
Have I become a god?
I have been called much worse.
Secretly that title makes me feel comfortable.
In my place, it's been a while.
This god-like complex does bring me a smile.
To create. To recreate.
Where to begin with Kanye West? The fact that some fans refer to him as Yeezus (a portmanteau of Yeezy and Jesus), the fact that his latest album is named Yeezus, or the fact that on Yeezus he has the song "I Am A God"?