Did These Stars Forget They Were Going to a Halloween Party?

While there are plenty of stars who get in the Halloween spirit every year, there's always a handful of celebrities who either halfheartedly don costumes to themed bashes or eschew disguises altogether. This year was no different, with stars like Tobey Maguire, Adam Sandler, and Jeremy Piven choosing to not don real costumes when they attended various All Hallows' Eve bashes — and no, wearing just a mask or a hat does not count as a costume.