Form follows function.
Pop
ABCAB
4~8 bar intro
32 bar verse
16 bar chorus
8~16 bar bridge.
32 bar chorus
16 bar chorus
2~4 bar outro.
my bad and no more than 3 and a half mins the listeners attention span isn't that long so make it cathy memorable and make an exit..haha4-8 bar INTRO
8-12bar VERSE... 8BAR chorus 8bar bridge