What's a song you associate with your biggest mistake?

I could pick a song that genuinely reminds me of my biggest mistake. But that would be too depressing, and I've got enough of that on my plate this morning. Instead, I'll go with Hey Ya! by Outkast. Released in August 2003, it took a while to build momentum in the UK before becoming an inescapable hit over the Christmas period. On New Year's Eve, a close friend and I made the error of accepting an invitation to a house party in Brixton where this song was played on repeat all night. This being South London in 2003, our only option was to wait until sunrise before miserably trudging five miles back to Brockley, pondering our mistake and mindlessly humming the damn tune all the way home. HNY!