Singing in his head

So we are sitting at the table last night, and were singing the Soul Cake song. I look over at Snookie and he has food in his mouth but he is bobbing his head. I asked him, "are you singing it in your head". With out missing a beat he finishes his bite and points to his head and says "yep, right in here, my head..." and then begins to hum the song. He is such a nut. I guess he has finally realized that he can control the songs in his head.