Kino Der Toten Easter Egg Song

To start Treyarch's easter egg song, you'll need to find all three pieces of Element 115. The first one is in the beginning room, next to the barrier underneath the stairs, it will be in a glass display. Just walk up to it. You can tell you're near a piece if you hear a slight ringing. Hold X. The next one is in the room with the MP5k, and is on another pedestal, but has no glass covering. It's back near the barrier that leads to nowhere, right next to the wall gun. Walk up and press X. For the last one, go to the room above the alley. Next to the window, looking over the alley, right next to the barrier, is a bunches of letters on the ground, and shelves. On the bottom row of shelves will be the last piece. Activate this last one to enjoy Elena Seigman's '115'