Downing Street Christmas Tree Switch On(01 of21)
Open Image ModalLONDON, ENGLAND - DECEMBER 03: The finalists of the Xfactor programme, James Arthur (C), Jahmene Douglas (L) and Christopher Maloney ( R) sing Christmas carols at the turning on the lights of the Christmas tree outside Number 10 Downing Street on December 3, 2012 in London, England. This year's Downing Street Christmas tree was grown by Mike Craig on his farm in Dumfries, Scotland. (Photo by Oli Scarff/Getty Images) (credit:Getty Images)
Downing Street Christmas tree(02 of21)
Open Image ModalPrime Minister David Cameron with X Factor judge Nicole Scherzinger and finalist James Arthur (front centre) in Downing Street for the switching on of the Christmas tree lights. (credit:PA)
Downing Street Christmas tree(03 of21)
Open Image ModalPrime Minister David Cameron with the three X Factor finalists (from left to right) Jahmene Douglas, James Arthur and Christopher Maloney singing, judge (far left) Nicole Scherzinger and hundreds of school children in Downing Street for the switching on of the Christmas tree lights. (credit:PA)
Downing Street Christmas Tree Switch On(04 of21)
Open Image ModalLONDON, ENGLAND - DECEMBER 03: Prime Minister David Cameron is joined by singer Nicole Scherzinger and the finalists of the Xfactor programme, James Arthur, Jahmene Douglas and Christopher Maloney, to turn on the lights of the Christmas tree outside Number 10 Downing Street on December 3, 2012 in London, England. This year's Downing Street Christmas tree was grown by Mike Craig on his farm in Dumfries, Scotland. (Photo by Oli Scarff/Getty Images) (credit:Getty Images)
Downing Street Christmas Tree Switch On(05 of21)
Open Image ModalLONDON, ENGLAND - DECEMBER 03: Prime Minister David Cameron (L) is joined by singer Nicole Scherzinger (C) and the finalists of the Xfactor programme, James Arthur (3rd R), Jahmene Douglas (C) and Christopher Maloney (2nd R), to turn on the lights of the Christmas tree outside Number 10 Downing Street on December 3, 2012 in London, England. This year's Downing Street Christmas tree was grown by Mike Craig on his farm in Dumfries, Scotland. (Photo by Oli Scarff/Getty Images) (credit:Getty Images)
Downing Street Christmas Tree Switch On(06 of21)
Open Image ModalLONDON, ENGLAND - DECEMBER 03: Prime Minister David Cameron (2L) is joined by singer Nicole Scherzinger (L) and the finalists of the Xfactor programme, James Arthur (3R), Jahmene Douglas (4L) and Christopher Maloney (R), to turn on the lights of the Christmas tree outside Number 10 Downing Street on December 3, 2012 in London, England. This year's Downing Street Christmas tree was grown by Mike Craig on his farm in Dumfries, Scotland. (Photo by Oli Scarff/Getty Images) (credit:Getty Images)
Downing Street Christmas Tree Switch On(07 of21)
Open Image ModalLONDON, ENGLAND - DECEMBER 03: Prime Minister David Cameron (L) is joined by singer Nicole Scherzinger (C) and the finalists of the Xfactor programme, James Arthur (3R), Jahmene Douglas (C) and Christopher Maloney (2R), to turn on the lights of the Christmas tree outside Number 10 Downing Street on December 3, 2012 in London, England. This year's Downing Street Christmas tree was grown by Mike Craig on his farm in Dumfries, Scotland. (Photo by Oli Scarff/Getty Images) (credit:Getty Images)
Downing Street Christmas Tree Switch On(08 of21)
Open Image ModalLONDON, ENGLAND - DECEMBER 03: Prime Minister David Cameron is joined by singer Nicole Scherzinger and the finalists of the Xfactor programme, James Arthur, Jahmene Douglas and Christopher Maloney, to turn on the lights of the Christmas tree outside Number 10 Downing Street on December 3, 2012 in London, England. This year's Downing Street Christmas tree was grown by Mike Craig on his farm in Dumfries, Scotland. (Photo by Oli Scarff/Getty Images) (credit:Getty Images)
Downing Street Christmas Tree Switch On(09 of21)
Open Image ModalLONDON, ENGLAND - DECEMBER 03: Prime Minister David Cameron (C) is joined by singer Nicole Scherzinger (C) and the finalists of the Xfactor programme, James Arthur (6R), Jahmene Douglas (7R) and Christopher Maloney (5R), to turn on the lights of the Christmas tree outside Number 10 Downing Street on December 3, 2012 in London, England. This year's Downing Street Christmas tree was grown by Mike Craig on his farm in Dumfries, Scotland. (Photo by Oli Scarff/Getty Images) (credit:Getty Images)
Downing Street Christmas Tree Switch On(10 of21)
Open Image ModalLONDON, ENGLAND - DECEMBER 03: Prime Minister David Cameron (L) is joined by singer Nicole Scherzinger (C) and the finalists of the Xfactor programme, James Arthur (3R), Jahmene Douglas (C) and Christopher Maloney (2R), to turn on the lights of the Christmas tree outside Number 10 Downing Street on December 3, 2012 in London, England. This year's Downing Street Christmas tree was grown by Mike Craig on his farm in Dumfries, Scotland. (Photo by Oli Scarff/Getty Images) (credit:Getty Images)
Downing Street Christmas tree(11 of21)
Open Image ModalPrime Minister David Cameron with the three X Factor finalists Jahmene Douglas, James Arthur and Christopher Maloney, judge Nicole Scherzinger and hundreds of school children in Downing Street for the switching on of the Christmas tree lights. (credit:PA)
Downing Street Christmas tree(12 of21)
Open Image ModalPrime Minister David Cameron with the three X Factor finalists Jahmene Douglas, James Arthur and Christopher Maloney, judge Nicole Scherzinger and hundreds of school children in Downing Street for the switching on of the Christmas tree lights. (credit:PA)
Downing Street Christmas tree(13 of21)
Open Image ModalPrime Minister David Cameron with the three X Factor finalists Jahmene Douglas, James Arthur and Christopher Maloney, judge Nicole Scherzinger and hundreds of school children in Downing Street for the switching on of the Christmas tree lights. (credit:PA)
Downing Street Christmas tree(14 of21)
Open Image ModalPrime Minister David Cameron with X Factor judge Nicole Scherzinger and finalist James Arthur (front centre) in Downing Street for the switching on of the Christmas tree lights. (credit:PA)
BRITAIN-POLITICS-CHRISTMAS(15 of21)
Open Image ModalBritish Prime Minister David Cameron (back R) stands next to singer and X Factor judge Nicole Scherzinger (back L) as the show's finalists James Arthur, Jahmene Douglas and Christopher Maloney sing before the lighting of the Christmas tree outside 10 Downing Street on December 3, 2012. AFP PHOTO/LEON NEAL (Photo credit should read LEON NEAL/AFP/Getty Images) (credit:Getty Images)
Downing Street Christmas tree(16 of21)
Open Image ModalPrime Minister David Cameron with the three X Factor finalists Jahmene Douglas, James Arthur and Christopher Maloney, judge Nicole Scherzinger and hundreds of school children in Downing Street for the switching on of the Christmas tree lights. (credit:PA)
Downing Street Christmas tree(17 of21)
Open Image ModalPrime Minister David Cameron with the three X Factor finalists Jahmene Douglas, James Arthur and Christopher Maloney, judge Nicole Scherzinger and hundreds of school children in Downing Street for the switching on of the Christmas tree lights. (credit:PA)
Downing Street Christmas tree(18 of21)
Open Image ModalPrime Minister David Cameron with the three X Factor finalists Jahmene Douglas, James Arthur and Christopher Maloney, judge Nicole Scherzinger and hundreds of school children in Downing Street for the switching on of the Christmas tree lights. (credit:PA)
BRITAIN-POLITICS-CHRISTMAS(19 of21)
Open Image ModalBritish Prime Minister David Cameron and X Factor finalists James Arthur, Jahmene Douglas and Christopher Maloney prepare to light the Christmas tree outside 10 Downing Street on December 3, 2012. AFP PHOTO/LEON NEAL (Photo credit should read LEON NEAL,LEON NEAL/AFP/Getty Images) (credit:Getty Images)
Downing Street Christmas tree(20 of21)
Open Image ModalPrime Minister David Cameron with X Factor judge Nicole Scherzinger and hundreds of school children in Downing Street for the switching on of the Christmas tree lights. (credit:PA)
Downing Street Christmas tree(21 of21)
Open Image ModalPrime Minister David Cameron with the three X Factor finalists Jahmene Douglas, James Arthur and Christopher Maloney, judge Nicole Scherzinger and hundreds of school children in Downing Street for the switching on of the Christmas tree lights. (credit:PA)