Chem-trails are poisoning our skies. 9/11 was an inside job. Aliens live among us. There’s no shortage of crazy conspiracy theory stories that get devoured by ‘truthers’ every day on the internet. And celebrities know about these issues, too. When stars openly talk about anti-vaccination conspiracies or AIDS being implanted in Africa, their voices go a long, long way. Check out which celebrities might believe in the theories you scoff at, or may even believe yourself.