Not All Dogs Go to Heaven - S7-E11
Trivia: Denise Crosby, who guest stars as herself, is a distant cousin of Seth MacFarlane.
Trivia: When Lauren takes Brian to the chamber to show him what she did, the corridor, the chamber, and the back-and-forth dialog about the experiment was directly copied from the scene in Star Trek II: The Wrath of Khan. Carol Marcus was taking Admiral Kirk to the Genesis Chamber.
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