I know a few lyrics but not the name of a song?

It's a song by a girl named nikki (spelling is bad) I don't think it's
nicki minaj but here's a few lyrics I know:
"It's my empire!
Sprinkle holy water on the vampire-ire
I'm the king!
I slayed Goliath with a sling"

Those are the only lyrics I know, but I really want to know the name
so I can look it up!!!