A very interesting blog entry by Kyler Clarke, who performs as the FrankenALice on stage
Be warned tho - there are spoilers about how the effect is executed (pardon the pun)
A View From The Top - Confessions Of A CerealKyler
I'm assuming that this is the same way that Iron Maiden bring Eddie to life during their shows as well
Here is footage of the FrankenAliceGaga creature in action!