Continuity mistake: When Peter is calling for people to fight Lois, he is standing next to a sign that says "Fight the ass kicking housewife" and has metal rings at the top. When it moves to a closer shot, a hyphen has appeared between "ass" and "kicking". Then, after the space where the commercial break would have been, the sign now says "$10.00" and there are no metal rings. Finally, in the next shot, the sign says "Fight the..." and has metal rings on top. (00:06:55)
Continuity mistake: When the family is in the traffic jam there's a shot from the front of the car, and in the next shot from the backseat of the car, Peter's face (glasses and part of nose) is reflected in the rear view mirror. However, there's no rear view mirror in the first front shot or shots following backseat shot.
Continuity mistake: When Peter is pretending to be a man-eating tree, there is more of a shadow on the tree in the first shot than in the shot right after he spits out 'Dan Rather'. (00:05:50)
Continuity mistake: In the scene where the family are singing an African song, they all point their arms up to the ceiling yet in the next shot, Lois's arms are immediately cupped and pointed downwards - you don't see her moving her arms to that position.
Continuity mistake: When Chris tells Meg not to rake the two leaves because they are his friends, one leaf is brown and the other is yellow. After Meg picks them up and crushes them, they're both brown.
Other mistake: When Lois knocks out the karate master, if you look in the stands, behind Peter, there is a person without a nose.
Revealing mistake: When Peter runs across the dock after getting out of the boat, a large chunk of his body is missing.
Continuity mistake: Chris states that Monaco is a principality, when he does the way he's sat on the floor changes between shots. (00:19:10)
Continuity mistake: When the family finish playing the music at the end, the xylophone is between Brian and Chris in the shot from behind them, However from the front it's disappeared and they have moved closer together. (00:19:00)
Continuity mistake: Lois drops her letter from Peter on to the floor where it simply vanishes. (00:18:15)
Continuity mistake: When the family is reading the letters that Peter sent, Stewie is stood next Meg, who disappears in the close up of Stewie. (00:17:45)
Continuity mistake: When Chris is drawing pictures of Meg with a pig's body, his left hand is holding the pad. When the shot changes his left hand is on the floor. (00:16:20)
Continuity mistake: When Lois says she's not going to use her Tai-Jitsu again, Meg's hands are over the end of the arms of her chair, When she stands up they are much further back. (00:16:10)
Continuity mistake: In the doctor's office the bandage on Peter's head keeps disappearing and reappearing depending on the shot. (00:15:50)
Continuity mistake: When Lois is telling Peter to take some action in regards of the New Yorkers, we see Quagmire in his window with his face having the middle section of the window across it. When we see a close up of Quagmire, the middle section is below his face. (00:11:25)
Continuity mistake: When Meg drops her rake, the handle is visible on the floor. As Chris starts to chase her, the rake has gone. (00:11:00)
Continuity mistake: When we see Meg and Chris raking the lawn, in the first shot there is no pile of leaves to Meg's right. However when the camera changes to a close up, there is. (00:10:30)
Continuity mistake: When we see Stewie playing basketball, the design of the fence changes drastically, Note the bottom. (00:10:00)
Continuity mistake: When Stewie is playing hoops, his position on the court is constantly changing between angles. (00:09:50)
Continuity mistake: When Stewie startles the old lady in church, the guy to her left moves much closer and changes where he is looking between shots. (00:03:20)
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