German Guy - S9-E11
Continuity mistake: When Franz Gutentag falls off the step towards the end of the episode, Herbert is on the porch of the house and reaches out to him. When we see the shot of Gutentag falling in slow motion and the birds fly away, there is no sign of Herbert on the porch.
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