Every singer and band want to get a number one, but there's a particular number one spot that reigns supreme, the coveted Christmas number one. Once you've nailed that bad boy, your name will be forever etched into the pop music history books. This 90-minute special uncovers the stories behind the UK's favourite festive hits through the decades, from the Pogues' Fairytale of New York to the controversial ousting of the reliable X Factor number one spot by Rage Against the Machine following a social media campaign. As per usual with these shows, there will be contributions from a load of has-beens including Mel C, Tony Mortimer of East 17, Joe McElderry and others who's names we have forgotten already.