LONDON, ENGLAND - MAY 02: Royal fans celebrate the news the Duke and Duchess of Cambridge have given birth to a baby girl at St Mary's Hospital on May 2, 2015 in London, England. (Photo by Samir Hussein/WireImage)
LONDON, ENGLAND - MAY 02: Royal fans celebrate the news the Duke and Duchess of Cambridge have given birth to a baby girl at St Mary's Hospital on May 2, 2015 in London, England. (Photo by Samir Hussein/WireImage)