Continuity mistake: At the start we can see Quagmire and Mort sat at the bowling lane and Peter is nowhere to be seen. When the shot changes, Peter is now stood ready to bowl. (00:00:35)
Continuity mistake: At the bowling alley just as Mort is about to bowl a perfect game, the bowling ball in Joe's lap and the beer in his hand disappear. (00:01:45)
Continuity mistake: When the green car is hit by the train in the chicken fight, the driver vanishes from the car instantly. (00:04:30)
Continuity mistake: During the chicken fight, when the cruise ship crashes into the airport, the man directing the planes disappears a split second before he gets run over. (00:05:50)
Continuity mistake: When Tom Tucker is reporting about Peter saving Horace, his angle in relation to the bar changes. (00:19:00)
Continuity mistake: During the Star Wars rip-off at the end, just before Peter climbs the Town Hall stairs, the people on the sidelines change. (00:19:45)
Continuity mistake: When Peter and the chicken are fighting, everything in the road vanishes instantly.
Continuity mistake: Peter falls from the roof of the Clam landing on Joan Cusack. He puts her body in a mailbox that appears just for this scene.
Other mistake: Lois goes to the bathroom at the bowling alley. There's only one way to the bathroom yet Quagmire beats her there and has time to hide in the stall. There's no way he could've done that considering he went after Lois.
Continuity mistake: When Peter is about to walk into the Drunken Clam, his seeing-eye dog refuses to go inside, so he puts the leash on a homeless man, thinking it was a fire hydrant. We actually see a fire hydrant in front of the homeless man, but then when Peter ties the dog up, it's gone.
Continuity mistake: When in the clam, the items under the bar change from pint glasses only to a mix of pint, martini and wine glasses and some boxes. (00:05:30)
Continuity mistake: We see an inmate say "I hear there is a lot of buzz about this new band". When he does there is an overhead shot showing that a lot of chairs are empty and that there is no group of people sat together but as the camera changes, the gaps have gone and seats are filled. (00:10:40)
Continuity mistake: The stains on the wall behind the drum kit keep changing between shots. (00:11:25)
Continuity mistake: As the inmates start to riot they all have chairs to sit down. But the shot changes and all but 3 of the chairs have disappeared. (00:11:40)
Continuity mistake: During the riots, the position of the instruments change, Cleveland drops the blue guitar on the floor but Chris grabs it from leaning against the wall. (00:11:50)
Continuity mistake: When Lois sits down at the keyboards a microphone and stand appear in front of her from nowhere. (00:12:00)
Continuity mistake: As Meg walks on stage at the prison, the items on the floor change drastically between shots. (00:12:15)
Continuity mistake: On the tour bus, in one shot we see Meg wearing her outfit that she wore when she had her make-over. Then about 10 seconds later you see her in a different outfit altogether.
Continuity mistake: Meg is wearing a pink top and blue bottoms in most of this episode, even when sitting at a table watching TV. Then, a few seconds later, when she demands her mum go get her a bag of Skittles, Meg is now in a solid pink dress.
Continuity mistake: When Peter's band is on stage he gets everyone's attention with a mic. Two shots later once they realise they can't play, the mic has mysteriously vanished.
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