 Complete the following phrase:  Originating from Canada, Micallef from Toronto, Walters from Vancouver, and Murray from Port McNeill, the Tenors have performed on more than 60 international television programs. They appeared on the Oprah Winfrey Show with Celine Dion in 2010, at the 63rd Primetime Emmy Awards, at the opening ceremonies of 2010 Winter Olympics in Vancouver and on ITV Diamond Jubilee Show at Windsor Castle for Queen Elizabeth II. The venues they have performed in include the Tel Aviv Opera House, and the Mandalay Bay Events Center in Las Vegas. They also appeared on the 