David Rose - Pool/Getty Images
Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge attend the Evening National Canada Day Celebrations on July 1, 2011, in Ottawa, Canada.
David Rose - Pool/Getty Images
Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge attend the Evening National Canada Day Celebrations on July 1, 2011, in Ottawa, Canada.
Getty Images
Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge attend the Evening National Canada Day Celebrations on July 1, 2011, in Ottawa, Canada.
AP Photo/Charlie Riedel
Prince William and Kate, the Duke and Duchess of Cambridge, arrive at a Canada Day celebration on Parliament Hill in Ottawa, Canada, Friday, July 1, 2011.
Pool
Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge arrive for the Evening National Canada Day Celebrations on July 1, 2011, in Ottawa, Canada.
AP Photo/The Canadian Press, Adrian Wyld
William and Kate, the Duke and Duchess of Cambridge, participate in Canada Day celebrations on Parliament Hill in Ottawa on Friday, July 1, 2011.
AP Photo/The Canadian Press, Adrian Wyld
William and Kate, the Duke and Duchess of Cambridge, participate in Canada Day celebrations on Parliament Hill in Ottawa on Friday, July 1, 2011.
AP Photo/The Canadian Press, Fred Chartrand
William and Kate, the Duke and Duchess of Cambridge, take part in Canada Day celebrations on Parliament Hill in Ottawa on Friday, July 1, 2011.
AP Photo/The Canadian Press, Adrian Wyld
William and Kate, the Duke and Duchess of Cambridge, and Canada Prime Minister Stephen Harper participate in Canada Day celebrations on Parliament Hill in Ottawa on Friday, July 1, 2011.
AP Photo/The Canadian Press, Fred Chartrand
William and Kate, the Duke and Duchess of Cambridge, take part in Canada Day celebrations on Parliament Hill in Ottawa on Friday, July 1, 2011.
AP Photo/The Canadian Press, Fred Chartrand
William and Kate, the Duke and Duchess of Cambridge, take part in Canada Day celebrations on Parliament Hill in Ottawa on Friday, July 1, 2011.
AP Photo/The Canadian Press, Adrian Wyld
William and Kate, the Duke and Duchess of Cambridge watch Canada Day celebrations on Parliament Hill in Ottawa on Friday July 1, 2011.
TIMOTHY A. CLARY/AFP/Getty Images
Prince William and his wife, Catherine, the Duchess of Cambridge, arrive on Parliament Hill during Canada Day celebrations on the second day of their nine-day tour of Canada on July 1, 2011.
AP Photo/The Canadian Press, Pawel Dwulit
The Duke and Duchess of Cambridge arrive on Parliament Hill in a landau for Canada Day celebrations in Ottawa on Friday, July, 1, 2011.
AP Photo/The Canadian Press, Frank Gunn
William and Kate, the Duke and Duchess of Cambridge, with Canadian Governor General David Johnston arrive in a landau at Canada Day celebrations on Parliament Hill in Ottawa on Friday, July 1, 2011.
AP Photo/The Canadian Press, Frank Gunn
William and Kate, the Duke and Duchess of Cambridge, with Canadian Governor General David Johnston, arrive in a landau at Canada Day celebrations on Parliament Hill in Ottawa on Friday, July 1, 2011.
AP Photo/The Canadian Press, Paul Chiasson
The Duchess of Cambridge, Kate, greets a mother and her newborn child during a citizenship ceremony Friday, July 1, 2011, in Gatineau, Canada.
AP Photo/The Canadian Press, Paul Chiasson
Prince William waves to the crowd as he leaves a citizenship ceremony Friday, July 1, 2011, in Gatineau, Canada.
AP Photo/The Canadian Press,Paul Chiasson
William and Kate, the Duke and Duchess of Cambridge, are saluted by an RCMP officer as they leave a citizenship ceremony on Friday, July 1, 2011, in Gatineau, Canada.
AP Photo/The Canadian Press, Paul Chiasson
Prince William speaks to the crowd following a citizenship ceremony Friday, July 1, 2011, in Gatineau, Canada.
AP Photo/The Canadian Press, Nathan Denette
Kate, the Duchess of Cambridge, greets royal fans after visiting the Museum of Civilization in Gatineau, Canada, on Friday, July 1, 2011.
AP Photo/The Canadian Press, Nathan Denette
Kate, Duchess of Cambridge, is guarded by security as she greets royal fans after visiting the Museum of Civilization in Gatineau, Canada on Friday, July 1, 2011.
AP Photo/The Canadian Press,Paul Chiasson
William and Kate, the Duke and Duchess of Cambridge leave a citizenship ceremony on Friday, July 1, 2011, in Gatineau, Canada.
AP PhotoThe Canadian Press, Paul Chiasson
William and Kate, the Duke and Duchess of Cambridge, flanked by Governor General David Johnston, left, and Immigration Minister Jason Kenney smile during a group photo with newly sworn-in Canadians at a citizenship ceremony Friday, July 1, 2011 in Gatineau, Canada.
AP Photo/The Canadian Press, Paul Chiasson
William and Kate, the Duke and Duchess of Cambridge, share a laugh after signing a guest book at a citizenship ceremony Friday, July 1, 2011, in Gatineau, Canada.
AP Photo/The Canadian Press, Paul Chiasson
William and Kate, the Duke and Duchess of Cambridge, greet newly sworn in Canadian citizens during a citizenship ceremony on Friday, July 1, 2011 in Gatineau, Canada.
AP Photo/The Canadian Press,Paul Chiasson
Kate, Duchess of Cambridge, greets a young newly sworn in Canadian citizen during a citizenship ceremony on Friday, July 1, 2011, in Gatineau, Canada.
AP Photo/The Canadian Press, Paul Chiasson
William and Kate, the Duke and Duchess of Cambridge greet a new Canadian citizen during a citizenship ceremony Friday, July 1, 2011, in Gatineau, Canada.
AP Photo/The Canadian Press, Paul Chiasson
William and Kate, the Duke and Duchess of Cambridge, applaud during a citizenship ceremony Friday, July 1, 2011, in Gatineau, Canada.
AP Photo/The Canadian Press, Paul Chiasson
Kate, Duchess of Cambridge, listens to proceedings during a citizenship ceremony Friday, July 1, 2011, in Gatineau, Canada.
AP Photo/The Canadian Press, Paul Chiasson
Prince William greets a new Canadian citizen during citizenship ceremony Friday, July 1, 2011, in Gatineau, Canada. The Duke and Duchess of Cambridge watched new citizens take the oath of citizenship, in which new Canadians pledge allegiance to the Queen, who is William's grandmother.
AP Photo/The Canadian Press,Nathan Denette
William and Kate, the Duke and Duchess of Cambridge, share a laugh during a citizenship ceremony at the Museum of Civilization in Gatineau, Canada, on Friday, July 1, 2011.
AP Photo/The Canadian Press, Paul Chiasson
William and Kate, the Duke and Duchess of Cambridge, flanked by Sharon Johnston, wife of Governor General David Johnston and Immigration Minister Jason Kenney, listen to proceedings during a citizenship ceremony on Friday, July 1, 2011, in Gatineau, Canada.
AP Photo/The Canadian Press, Paul Chiasson
William and Kate, the Duke and Duchess of Cambridge, sing "God Save the Queen" during a citizenship ceremony on Friday, July 1, 2011, in Gatineau, Canada.
AP Photo/The Canadian Press, Nathan Denette
Kate, Duchess of Cambridge, smiles as she take part in a citizenship ceremony at the Museum of Civilization in Gatineau, Canada, on Friday, July 1, 2011. The duchess was dressed in Canadian colors - a cream dress by the London designer Reiss, complete with the Queen's Maple Leaf brooch, and a red hat topped with a maple leaf. Queen Elizabeth II loaned the brooch to the duchess for the tour; it was first worn in 1951 by the then-Princess Elizabeth on her first visit to Canada.
AP Photo/The Canadian Press, Paul Chiasson
William and Kate, the Duke and Duchess of Cambridge, chat during a citizenship ceremony in Gatineau, Quebec, Canada, on July 1, 2011.
AP Photo/The Canadian Press, Paul Chiasson
Prince William and Kate, the Duke and Duchess of Cambridge, arrive at a citizenship ceremony in Gatineau, Quebec, Canada, on July 1, 2011.
AP Photo/The Canadian Press, Nathan Denette
Prince William's wife, Catherine, Duchess of Cambridge, waves to the crowd as she arrives at the Museum of Civilization with Sharon Johnston, wife of the Governor General of Canada, in Gatineau, Quebec, Canada, July 1, 2011.
AP Photo/The Canadian Press, Paul Chiasson
William and Kate, the Duke and Duchess of Cambridge, arrive at a citizenship ceremony in Gatineau, Quebec, Canada, on July 1, 2011. The royal couple watched new citizens take the oath of citizenship, in which new Canadians pledge allegiance to the Queen, who is William's grandmother.
