S02E31: The Continental Touch

Having been given a stylish makeover by a famous French couturier, Elly May is mistaken for a visiting foreign princess by Mrs. Drysdale. Hoping to get in good with "royalty," Mrs. Drysdale throws a fancy party for Elly. This time around, the old dear is certain that her soiree won't be invaded by "those dreadful hillbillies."