Here's a fun excuse to emerge from obscurity. I was going to say Seven Nation Army first and foremost. It's a fine song with a cool riff, but it somehow spawned the most insufferable sports chant in human history. I refuse to ever participate in it and I mute the TV whenever a crowd gets it going. I'm cool with "LET'S go SPORTS Team! *dun dun dadadun*" I'm cool with "D-FENCE *clapclapclap*" I'm even cool with doing the wave. The Seven Nation Army chant needs to be retired as soon as possible.
Other than that, I'll go with the "Doncha wish your girlfriend was hot like me" song because nothing good can ever come from its existence, I'll go with the "Crank Dat Soulja Boy" song for ruining 8th grade, and I'll call with the "I heard there was a secret chord that David played and it pleased the Lord Halleljuah" song for being a prerequisite to every talent show, piano recital, and sappy slideshow in the universe.