U2 should already know that a rattle and hum can grow into a roar heard 'round the world, but frontman Bono got a reminder this week while listening to new U2 tracks in his French vacation home.

A fan overheard the music and thought to record it on his makeshift bootlegging equipment: his cell phone. Predictably, the four tracks he managed to capture were instantly uploaded on YouTube. Although they've since been removed for obvious reasons, it's too late -- the cat is out of the bag and four new U2 tracks are making the rounds. The quality is, as the Irish might say, "piss poor," but in a way that only gives it a certain bootleg charm.

And that, dear friends, is how a leak is born.