Jools and Lynda Topp have become national icons with their special blend of singing, yodelling, and comedy.
Now, they are about to embark on a new tour, taking their unique road show throughout the country.
Even after years of popularity the twins say the secret of their success is a mystery.
"It's a twin thing," says Lynda, who admits things have changed since they first started performing.
"There were lots of things that needed to be changed in this country and we were part of those, we were always part of them. And I think people noticed us maybe a little more in a lot of those protests that were back there because we wrote a song about every single one of them and sang it at the protest meetings and the marches."
Even today, the twins say they remain true to their protest roots, something which they believe makes them popular with Kiwis.
"Everyone wants the freedom to be able to say what they want," says Jools. "If they start to shut other people down then they'll get shut down, it's a matter of freedom."
Lynda says over the years they have learnt that the best way to get a message through to people is by entertaining them.
"You've got to get people's barrier's down, make them relax and feel good and then you hit them with the hard stuff."
An Evening With The Topp Twins kicks off in Tauranga on November 6, before visiting Christchurch, Auckland and Wellington.
Watch the video for the full interview with the Topp Twins.