I think Cee-Lo's "Forget You" is a really excellent Breakup song. Also up there? All American Rejects' "Give You Hell" and of coures Alanis Morrisette's "You Outta Know". I wondered if guys had a different perspective, so I did some digging and found "Top 10: Breakup Songs" at askmen.com.

They take a little different approach that I found refreshing:

It would be easy for us to rattle off some of the most celebrated post-breakup ditties like “Nothing Compares 2 U” and “You Oughta Know,” but we’ve decided to take a more off-kilter approach. We’ve compiled a list of top 10 breakup songs that’s rife with depressing, wrist-slitting tunes, but we’ve also included more than a few angry rock songs designed to kick-start your new life now that she isn’t a part of it.