CALGARY, AB - JULY 07: Catherine, Duchess of Cambridge arrives at Calgary Airport on day 8 of the Royal couple's tour of North America on July 7, 2011 in Calgary, Canada. (Photo by Samir Hussein/WireImage)

CALGARY, AB - JULY 07: Catherine, Duchess of Cambridge arrives at Calgary Airport on day 8 of the Royal couple's tour of North America on July 7, 2011 in Calgary, Canada. (Photo by Samir Hussein/WireImage)