Pink, "I wanna start a fight". (So What)
May not sound like a great pick, but it comes with a story. Shortly after christmas a few years back I got sent overseas to Afghanistan. One of my buddies got a Pink CD over the holidays and threw it into our trucks CD player (while on the main base we had a small SUV, not great but not an army truck either). It took all of 2 days for the CD player to break down. This resulted in two options, a) no music b) That one song on repeat. The truck stayed that way for 4 months. Everything from driving to lunch, to speeding around the base to catch a helicopter that would take us to a bombsite was to the sound of that song...
*edit* apparently I got the title wrong, it's "so what"