Factual error: When Carol gives birth there is no umbilical cord. (00:06:30)
Continuity mistake: We see Stewie and Bertram face off for the first time and a bit of newspaper floats between them and simply vanishes. (00:16:40)
Continuity mistake: When Peter is playing the guitar on the stairs, in the side on shot he is facing Lois with the guitar neck by the banister. When the shot changes he's facing away from Lois and the next is pointing away from the banister. (00:14:30)
Revealing mistake: When Dr Hartman collapses, he falls off screen but as he disappears the animation is messed up in that he vanishes before the edge of the shot. (00:06:05)
Continuity mistake: When the kids arrive at Quagmire's house, the clock shows 3pm. When the camera changes to Quagmire the clock now says 2:05pm. (00:02:05)
Continuity mistake: On the way to the hospital, Carol's position in the car changes from the middle to the side instantly. (00:05:10)
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