Call of Duty: Black Ops 3 - Cold Hard Cash Musical Easter Egg
This video explains how to activate the Cold Hard Cash musical easter egg on the Shadows of Evil Zombies map in Call of Duty Black Ops 3. All you need to do is find three pieces to a microphone and interact with the microphone in The Black Lace Burlesque.
For more on Call of Duty: Black Ops III, check out the full wiki on IGN:
http://www.ign.com/wikis/call-of-duty-black-ops-3