Arguably the most familiar geek of all the X-chromosomes on our countdown, Munn set the bar for female nerds when she made it blatantly sexy and mainstream to be one on G4's Attack of the Show. Although video game knowledge wasn't exactly her strongest suit, Munn's dedication to the culture, proved by her penchant for dressing up as sci-fi/superhero characters, cemented the former Daily Show correspondent as a sex symbol.