Continuity mistake: When the Grinch drops the sack, the sack lands next to him, but in the next shot, it is gone. (00:11:45)
Continuity mistake: When Joe arrives at the orphanage when he's telling his story, the sign changes position and the writing changes on it. (00:11:30)
Continuity mistake: When the policeman asks Lois to describe Peter, it shows a view through a scope of a rifle. However, when the shot changes and the cop says "I've got him", there is no scope on the rifle. (00:18:15)
Continuity mistake: When Peter is saying how he hated the last few years of MASH, Mr. Weed just appears behind him in a shot change. (00:01:35)
Continuity mistake: When Peter is improvising in the bank, the bag of money disappears in one shot. (00:17:30)
Continuity mistake: During the scene where Joe is putting his trophies on the shelf, the size of the shelf in relation to the trophies changes. (00:07:15)
Chosen answer: It's a real song called "Elvira". Originally by Dallas Fraizer in '66, however, this version seems to be the Oak Ridge Boys cover version. However, the mega lesbians skip the verse and just sing the chorus after the opening line.
Bishop73