Anthony “C-P3O” (!) Daniels alluded to this hashtag blunder during his very motivational speaker-esque monologue, and here's the screenshot to prove it (h/t to TechRadar editor Patrick Goss):
Star Wars Celebration just spelled C3PO wrong pic.twitter.com/n0iP0SbKFX
– PatrickGoss (@PatrickGoss) April 16, 2015