In Pictures: Kate steps out in a sleeveless dress in Quebec
The Duke and Duchess of Cambridge arrive in Charlottetown, Sunday, July 3, 2011.THE CANADIAN PRESS / Paul Chiasson
Prince William and his wife Catherine, Duchess of Cambridge, pose for a photo before departing Jean Lesage International Airport in Quebec City July 3, 2011.REUTERS / Mathieu Belanger
The Duke and the Duchess of Cambridge visit Fort Levis in Levis, Quebec on Sunday, July 3, 2011.THE CANADIAN PRESS / Sean Kilpatrick
Catherine, Duchess of Cambridge, prepares to depart Jean Lesage International Airport in Quebec City July 3, 2011.REUTERS / Mathieu Belanger
Catherine, Duchess of Cambridge, disembarks the HMCS Montreal in Quebec City July 3, 2011.REUTERS / Christinne Muschi
Catherine, Duchess of Cambridge disembarks HMCS Montreal on July 3, 2011 in Quebec, Canada.Chris Jackson/Getty Images
The Duke and Duchess of Cambridge take part in a morning prayer service on board HMCS Montreal in Quebec City Sunday, July 3, 2011.THE CANADIAN PRESS / Adrian Wyld
Catherine, Duchess of Cambridge, arrives for a tour the War Museum in Ottawa on July 2, 2011, the third day of a nine-day tour of Canada.GEOFF ROBINS / AFP / Getty Images
Catherine, Duchess of Cambridge, arrives at reception at the Canadian War Museum in Ottawa July 2, 2011.REUTERS / Blair Gable
The Duke and Duchess of Cambridge leave after performing a ceremonial tree planting at Rideau Hall in Ottawa on Saturday, July 2, 2011.THE CANADIAN PRESS / Nathan Denette
The Duke and Duchess of Cambridge, applaud as they watch the Canada Day's Evening show on Parliament Hill in Ottawa, Canada on the second day of their visit to the Commonwealth country Friday July 1, 2011.AP Photo / David Rose
Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge arrive for the Evening National Canada Day Celebrations in the capital accompanied by representatives of the National Capitol Commission on July 1, 2011 in Ottawa.Pool / Getty Images
The Duke and Duchess of Cambridge arrive to take in the Canada Day evening celebrations and performances in Ottawa, Friday July 1, 2011.THE CANADIAN PRESS / Fred Chartrand
The Duchess of Cambridge waves to the crowd as she is accompanied by the Governor General's wife Sharon Johnston while arriving at the Museum of Civilization in Gatineau, Que., on Friday, July 1, 2011.THE CANADIAN PRESS / Nathan Denette
Catherine Middleton, the Duchess of Cambridge, attends a citizenship ceremony at the Canadian Museum of Civilization in Hull, Quebec near Ottawa July 1, 2011.REUTERS / Blair Gable
Catherine Middleton, the Duchess of Cambridge smiles following a citizenship ceremony at the Canadian Museum of Civilization in Hull, Quebec near Ottawa July 1, 2011.REUTERS / Blair Gable
Prince William (C) and his wife Catherine, Duchess of Cambridge, take part in a youth reception at Rideau Hall in Ottawa June 30, 2011.
The Duchess of Cambridge is saluted by a Mountie as she arrives in Ottawa on Thursday June 30, 2011.
Britain's Prince William (unseen) and his wife Catherine, Duchess of Cambridge arrive at Ottawa's Macdonald-Catier International Airport in Canada June 30, 2011.
Prince William and his wife Catherine, Duchess of Cambridge arrive at Ottawa's Macdonald-Catier International Airport in Canada June 30, 2011.
Prince William, Duke of Cambridge & Catherine, Duchess of Cambridge board a plane of the Royal Canadian Air Force at London's Heathrow Airport on June 30, 2011 in London, England.
ASPIRIN-COX LOUIE FAVORITE/COX NEWS SERVICE STUDIO - Aspirin illustration from different manufacturers. Preliminary research suggests that aspirin may be helping prevent a host of major American killers, including colon and breast cancer.Louie Favorite
Prince William, Duke of Cambridge talks to James Wright (left), the Canadian High Commissioner to the United Kingdom while he and Catherine, Duchess of Cambridge (rear right) walk to board a plane of the Royal Canadian Air Force at London's Heathrow Airport on June 30, 2011 in London, England. The Duke and Duchess of Cambridge travel to Ottawa for their first overseas tour as a married couple, the 11 day tour will take them to Canada and then on to California.