Which famous sibling group was the show's musical guest on the September 28, 1974 episode?

Like most guests, the Pointer Sisters jumped into the comedy action alongside the regular cast. The R&B trio performed in a skit based on “My Fair Lady” and joined Burnett and Vicki Lawrence for a hilarious rendition of “Get Me To The Church On Time”.

Asked by Susanna Henke · Last updated 5 years ago · 1K views · SOURCE