Continuity mistake: When Peter returns home from being hyped up on Red Bull, he has numerous cans in his arms. When he sees Stewie he immediately drops the cans on the floor but when the camera pulls back as he sits down with Stewie in his lap, the cans of Red Bull are nowhere to be seen.
Factual error: When Peter is on The Price is Right, Drew says he's the top winner of the day so he'll spin first. However, the top winner always spins last.
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