Damon and Affleck (who gives such a nice performance here I'm willing to forgive the clunk-and-clink he had to participate in in "Chasing Amy") are darn good screenwriters, and I'll tell you exactly why I think so.
The excellent pink-bubblegum explosion ''I Forgive You'' plays like a heartfelt postscript to the guy who left her in ''Since U Been Gone, '' with Clarkson's lived-through-this vocals making the lyrics even more poignant: ''We were just a couple of kids...no shame, no blame.