
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. (00:12:40)

Barely Legal - S5-E8
Continuity mistake: At the end, Quagmire takes his robe off and is on the floor. When he comes back with the book for Meg, the robe is gone from the floor. (00:20:30)

Barely Legal - S5-E8
Continuity mistake: Meg gets undressed and leaves her dress by the legs of Brian's chair. When the police enter, the dress is gone. (00:18:50)

Barely Legal - S5-E8
Continuity mistake: When Meg leaves the kitchen and Brian puts his coffee mug on the table, its position is constantly changing when talking to Stewie. (00:08:35)

Barely Legal - S5-E8
Revealing mistake: Every time Cleveland's tub slides out of the house, there's never any plumbing attached to it. It just sits on top of the floor so it slides out easily. In this episode its very easy to see. (00:02:50)
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