Damn that's old...and it's quite likely I saw that on TV when it came out...my parents watched "The Smothers Brothers" every week...
I ROFL @ the style of dress...in that performance, they were still riding the coat-tails of the folk music wave that started in the early 60's, and most "non-rock" performers still wore ties in concert...contrast that performance with this one from about 2-3 years later:
http://www.youtube.com/watch?v...w&mode=related&search=
dress style was a little "more hip" and OMG, they had grown their hair long! Sort of the David Cassidy look...
But they were hella popular in their day...