When You Wish Upon a Weinstein - S3-E22
Peter Griffin: You better watch who you're calling a child Lois. Because if I'm a child then you know what that makes you? A paedophile, and I'll be damned if I'm gonna stand here and be lectured by a pervert.
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