Twain pulled out all the stops in a dazzling visual spectacle, during her first of three Toronto appearances on the Rock This Country tour. Nick Krewen Music, Published on Thu Jun 25 2015 Shania Twain 3 stars June 24 at the Air Canada Centre. It seems that her two-year stint in Vegas has taught our Shania a few tricks of the performance trade. In the homegrown pop-country superstar’s first Toronto…