Call of Duty: Black Ops II

Alright, today, I purchased the Season Pass and tried out Nuketown Zombies. I wanted to activate the song through the teddy bears (Moon's loading screen song) but every time I held X on one of the Teddy Bears, nothing happened. I attempted to shoot, knife, grenade, and hold x on these. No matter what, I couldn't get the Teddy Bear to activate. I know all 3 locations, but they won't activate the song. Please help me.
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I thought there were two songs.
1) Shoot/Mannequin heads
2) Activate 3 Teddy Bears
--Bus Seat
----Bunk bed near the M16A1
------Behind fence in the backyard that has the Fallout Shelter
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