Prince William and his new bride will be entertained by a coast-to-coast roster of Canadian talent on Canada Day.
Performers for the royal couple on Parliament Hill include the Newfoundland band Great Big Sea, Quebec's Sam Roberts Band and Winnipeg's Maria Aragon.
The 10-year-old Aragon gained fans around the world after a video of her performing a Lady Gaga song was posted on YouTube. She's since played with Lady Gaga herself, as well as with Prime Minister Stephen Harper.
Other featured artists at the noontime show include Dan Mangan from B.C., Elisapie Issac from Nunavut and folk singer Jenn Grant from P.E.I.
Altogether, there are more than 105 acts performing for Canada's 144 birthday, which is also being billed a celebration of the centennial of Parks Canada and the 120th anniversary of the Canadian invention of basketball.
Exposure provided by the royal guests drove the show's producers to put on the biggest spectacle they could, said Marie Lemay, the chief executive officer of the National Capital Commission, which is overseeing the show.
There are an estimated 85 international media travelling to Canada to cover Prince William and Catherine's trip.
"It's a time for Canadians to show the world how proud we are," Lemay said.
An average of 300,000 people attend the festivities on the Hill each year, but Lemay said a much bigger crowd is expected this year to try to catch a glimpse of the royals.
Extra screens are being set up in nearby locations for people who don't want to brave the crush, and additional security will be in place.
The Duke and Duchess of Cambridge, as they are now known, arrive in Canada on June 30 for an eight-day visit. It's their first official tour since their April wedding.
They'll also visit Montreal, Quebec City, Yellowknife, Calgary, Charlottetown and Summerside, P.E.I.
While they will attend the noon show on Parliament Hill, the details of their itinerary have not yet been made public.