It is mentioned that Louise and Helen are going to a Stevie Wonder concert. In 1977, the year this episode aired, Wonder's 18th studio album, "Songs In The Key Of Life" (1976), peaked at #2 on the U.S. Billboard 200 charts for albums of the year, and the album was selected as Album Of The Year at the 19th Annual Grammy Awards in February, 1977. Including hit songs such as "Isn't She Lovely" and "Sir Duke", the album reached Diamond Certification, selling over five million copies.