
Continuity mistake: When Peter is talking about how annoying it is to be locked up in the house, Brian disappears from the couch in quite a few shots. (00:07:50)
Stuck Together, Torn Apart - S3-E19
Continuity mistake: In this episode, Mort Goldman shows Peter a dating video he made, saying it's how he and his wife met. He is an adult in the video, yet in an earlier episode 'The Kiss Seen Round The World', Mort's wife tells the Griffins that she met him when they were just 14.
Continuity mistake: When Peter is on the phone talking to Death the color of the napkin on the table changes from red to a brownish color.
Continuity mistake: When Death is talking about how he wanted to be a wood nymph, he has no pillows, but in the next shot, he has a blue pillow.

The Courtship of Stewie's Father - S4-E16
Continuity mistake: When the baseball crashes through Herbert's window, the glass shards are in different places in different shots. (00:04:05)

Peter, Peter, Caviar Eater - S2-E1
Continuity mistake: In the scene where the Griffins are at the yacht club, Peter is telling a rat story. Before he talks about a steak, Lois' earrings are white, but right after they suddenly change to blue. (00:09:10)
Family Guy Viewer Mail #1 - S3-E21
Continuity mistake: During the Scooby Doo send-up, there are red doors all along the corridor, but when Peter is talking about Istanbul, the red doors are gone. (00:18:35)

Continuity mistake: Just after Patrick 'kisses' his imaginary girlfriend goodbye and tells Brian to look after her, Brian switches position on the couch. In the first shot he is sitting on a crack between couch pillows, but in the next shot he is sitting in the middle of the centre pillow. (00:13:50)

Continuity mistake: When we first see the two commentators in the box, the blue suited one doesn't have a mug, but in the next shot, there is a mug next to his microphone. (00:15:35)

Continuity mistake: When we first see all the guys at the NAAFP meeting, there are two guys in the top right corner; one with a singlet and one with brown hair and a green-brown T-shirt. In the next shot, these two guys come in from the opposite side of the screen. (00:12:15)
Airport '07 - S5-E12
Continuity mistake: When Peter unplugs the plane's fuel hose, he spills fuel near the stairs, but when the two airport workers come over, the spilled fuel is gone. (00:05:05)
Peter, Peter, Caviar Eater - S2-E1
Continuity mistake: When we first see the toy train under the floor, it has four carriages, but in the next shot, we see five carriages go past. (00:19:25)
Continuity mistake: When Peter goes back in time the first time, we see him and Cleveland slapping hands around the pool, we see that the pool is significantly shorter than in the scene where we first see Lois.

Continuity mistake: At the bottom of the stairs there is a picture of Peter and Lois, and the song "So Long, Farwell" starts. The kids start singing and you can see in the backround the picture is gone then comes back when the kids are going back up the stairs. Not only that, look closely at the picture of Stewie, you will see it has grown. (00:04:20)
Continuity mistake: Brian insults Stewie about the water and there is a water glass by Bryan's plate. Then it cuts to a shot of Stewie and Chris, and the glass is gone.
Airport '07 - S5-E12
Continuity mistake: When we first see Peter lounging on the front lawn with his feet in the baby pool, there is water that has spilled out of the pool onto the lawn, but in the next shot, the spilled water is gone. (00:02:15)
Barely Legal - S5-E8
Continuity mistake: When Meg is introducing Brian to Meg's friends, they are at the mall sitting at a table with trays on it. There's a close-up on one of Meg's friends, and the trays and food are gone.

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.
Other mistake: The 'KISS' logo above Kiss's stage isn't actually held up by anything.
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