The X Factor Finalists Visit Downing Street
Stars switch on Christmas lights and meet the Prime Minister ...
Hundreds of schoolchildren watched as they turned the illuminations on, joining the final three in a selection of Christmas carols.
The event was organised in honour of the charity Together For Short Lives, which will be the beneficiary of this year's winner's single.
In other X Factor news, Jade Ellis has announced on Twitter that she won't be attending the final in Manchester this weekend because she was only given one ticket.
The singer, who went out of the competition in one of the early live shows this year, is angry that her daughter will not be able to join her at the MEN Arena - and so is boycotting it.
She wrote: "Looks like I won't be at the final either now... #itsajoke.
"Over it... I would have love to go but I have no intention of leaving Caiden for three days!!! No tickets for family!! #terrible.
"In utter disbelief tbh... #shocked #disappointed."
We told you this morning how Union J have said they are glad they did not win the show.