Hallowe'en is truly a time for everyone to be a star actor in the performing art of costume and even mime that has marked this holiday from its very start. It did not arise full blown in the 21st century. It had historical roots in the events and performances of past rituals in past times. The idea went as far back as Roman times with Roman rites and enactments; this scary holiday had Celtic roots in Gaelic customs; then finally the church adapted it to fit the religion of the time.
Here are the facts about those historical precedents in the accompanying list.
Additonally check out the genre of Hallowe'en Carols composed by Kristen Lawrence.
These are performed by children dancing in costume:http://www.youtube.com/watch?v=KOmNJRbPoSA&feature=share&list=UUp4l3OQcwG6FcH82b0TvfPw
Additionally Kristen Lawrence has a "Souling Song - Samhain Version" at: http://youtu.be/j35dvmdse9k