E! Online is reporting that a police affidavit explains what sparked the fight between Charlie Sheen and wife Brooke Mueller. According to the affidavit prepared by Sheen, he and Brooke got in a dispute over a Christmas song. Sheen further explained that he was having a conversation with his wife about a Christmas song he has with his daughter from his previous marriage. His wife then became angry that she and Sheen did not have their own Christmas song, and of course the argument continued to build from there. This is just really really stupid!