Oooh, I'm awesome at break up songs of all genres! Plus I'm including songs that are kind of like regretting a breakup too.
Prince - I hate you
Kelis - Caught out there
Separate ways - journey
Nothing compares 2 u - either the prince or sinead o'connor version
cry me a river - all songs by this name and all artists especially aerosmith
That justin timberlake song what goes around comes back around or something like that
Don't leave me - blink 182
FOD - green day
you oughtta know - alanis morrissette (i still love this song)
break down - mariah carey
irreplaceable - beyonce
get gone - ideal
me, myself and i - beyonce
it's over now - 112
no woman, no cry - (not technically a break up song but totally awesome after a break up)
puke - eminem
i hate everything about you (i forget who sings it)
hurt - nin
goodbye my lover - james blunt
back off health forum - guns n roses
you made a fool of me - me'shelle ndegecello (or whatever, i can never get the title or her name right)
if i think of more, i'll post... oh i had an ex that drunk dialed a lot so now whenever i hear call me when you're sober it reminds me of him and has been officially added to my playlist. oh yeah about 70% of country music belongs on this list too.