I made a DeadMau5 head for Halloween. About 160 WS2812B LEDS hooked up and running the DemoReel.
I eventually broke the setup while trying to get the eyes working in conjunction with the mouth. Got the eyes working for the night of Halloween so not all was lost. Got lots of compliments.
http://www.youtube.com/watch?v=V9lD9ePE3hs