Naming the Twins is the Nova Scotia based guy gal duo of Robbie Smith & Kath Glauser who sound a little bit like Peter, Paul and Mary if one of the fellows took the night off, a bit like Simon & Garfunkel if Art was a girl, a bit like Gordon Lightfoot or Stan Rogers if either had a girl harmonizer.
Not twins by birth, but twins at heart, they share a sibling like sense of humour and harmony.