Heidi KlumHalloween is a big deal in Hollywood. There are always stars who go all out with elaborate costumes. This year was no exception. The Honey Boo Boo clan took on another reality TV family -- the Kardashians, which was pretty funny. Then there was Al Roker's spot-on take on '80s icon Mr. T. Take a look at 6 more incredible getups from our favorite celebs.