Virtually everything from the Simon and Garfunkel's Greatest Hits album, especially "Bridge Over Troubled Waters," "America," "Mrs. Robinson," "I Am A Rock," "El Condor Pasa," and "Cecilia."
Carol of the Bells. No joking. It's been in my head constantly for the past 6 or 7 years. I even start whistling it softly when I get nervous. And then I don't even realize that I'm doing it.
_________________ "I am to misbehave" - Mal
BATMAN: I'll do everything I can to rehabilitate you.
CATWOMAN: Marry me.
BATMAN: Everything except that.