Catherine, the Duchess of Cambridge, arrives to attend the Royal family Christmas Day church service at St Mary Magdalene Church in Sandringham, Norfolk, eastern England, on December 25, 2011. Britain's Prince Philip missed the royal family's Christmas Day celebrations for the first time as the husband of Queen Elizabeth II remained in hospital after having heart surgery.   AFP PHOTO / BEN STANSALL (Photo credit should read BEN STANSALL/AFP/Getty Images)