I'm thinking that my funniest typo ever was when I wrote "Sonny and Chet." Then I was just thinking of Sonny Bono singing "I've Got You" with that blob monster from Weird Science.
When I saw you typed Chet my first thought was of Chet Huntley, NBC news co-anchor of the Huntley-Brinkley six o'clock news. I would have loved to see his solemn face as straight man for Sonny. "Good night Chet. Good night Sonny." Actually, it's even more interesting after I remembered that Brinkley did the Washington part of the report and Sonny wound up a congressman working there. NBC could have just let Sonny do the report from DC then added in a little song and dance and comedy routines to end the show. I'll bet they would have beaten Walter Cronkite in the ratings with those. :)
The Captain and Tenniille were another musical married couple who had their own variety show, from 1976-77. Johnny Cash and June Carter had two variety shows in the 70s too. Great quiz!
It's amazing how much this stuff permeates pop culture for years. I've seen a few of these in re-runs, but am too young for most of them and was still able to get 100%.