Till the radio plays something familiar

So John has infected me with the Decemberists virus. But I have a problem: WHY DO I ALREADY KNOW "BILLY LIAR"? Is it in a movie? On the TV? Does one of YOU listen to it on repeat? WHY DO I KNOW THIS SONG? Please, save my sanity.
It's pretty tenuous, anyway. Four hours of sleep, one crappy Greek paper, and thirteen Latin sentences later, I am all about the physics. Now to absorb four weeks of lectures in four hours. Must . . . cram . . .