VIDEOS:
Nanowar - "Pasadena 1994"
Nanowar of Steel's "Pasadena 1994" uses a two-stanza chorus, switching the second stanza each verse. They also throw in a key change, common in power metal (the song is a parody of Sabaton) on the last verse.
Example of:
Changing Chorus
Sabaton - "Aces in Exile"
Example of:
Changing Chorus