The Courtship of Stewie's Father - S4-E16
Continuity mistake: After "Herbert the Pervert" leaves the Griffins' house, the size of the couch in relation to Chris changes distinctly between shots.
The Courtship of Stewie's Father - S4-E16
Other mistake: When Mr. Hubert is singing about his fantasy life with Chris, he is reflected in a mirror but his arms do not have the same angle; the reflected one is much steeper.
The Courtship of Stewie's Father - S4-E16
Continuity mistake: When the baseball crashes through Herbert's window, the glass shards are in different places in different shots. (00:04:05)
The Courtship of Stewie's Father - S4-E16
Character mistake: Lois takes a basket of clothes downstairs to wash them. But she puts them in the dryer instead of the washer.
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