Explaining the thinking behind her daughter’s name, she said: ‘When I had Ivy I thought the name was perfect. Deck the halls with Disney! You’re not Katie, you’re Batgirl. The star dressed up as Raven, a fictional superhero from American comic books published by DC Comics. “ Celebrities at this year’s event included William Shatner, George Takei, Christina Ricci, Michael J. Fox and Carl Weathers, among others.