[Paris, October 31. Image via Getty.]

People, dress up as zombies, attend a march to celebrate Halloween, on October 31, 2009, in Paris. Halloween, which falls annually on October 31, is an ancient Celtic pagan rite, originally held to celebrate the dead and the end of the harvest season. Banner reads: 'Living dead are hungry.' AFP PHOTO FRANCOIS GUILLOT (Photo credit should read FRANCOIS GUILLOT/AFP/Getty Images)