It is hard - very hard - to write a good Christmas song in the modern-day, let alone one that not only stays in the public consciousness but grows in popularity year in, year out.
But Leona Lewis struck gold in 2013 with One More Sleep, the rare kind of festive song that has now become a staple in Britain as soon as December comes around.
It's becoming as recognisable as your Mariah's and your Wham!'s, and its stature will only grow as time goes on. To celebrate, Leona has re-released the original album Christmas, With Love with some exciting new additions, including some new tracks and collaboration with US singer Ne-Yo on a re-package titled Christmas, With Love Always.
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