Continuity mistake: Brian and Stewie see Meg enter Mayor West's motel room. She's wearing a purple dress. They follow them to a restaurant and Meg has her regular hat and outfit on.
Audio problem: In the flashback of Handful of Peter singing about the Indian chief, the musical notes Peter and Lois play continue to change pitch after they take their hands off their instruments' frets, which should default back to the open string notes.
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