Halloween provides a chance for celebrities to put on their costumes, and once in a while, those getups are actually the guises of other well-known stars. In 2014, so many celebs dressed up as Amal and George Clooney. And of course, Miley Cyrus's infamous MTV Video Music Awards performance was a definite hit in 2013. And while there have been a bunch of pop star impersonators, there are plenty more including artists, cultural icons, and even reality stars. Keep reading to see all the celebrities dressed as celebrities on Halloween over the years!