As you may have heard, a new Leona Lewis track has leaked and no amount of mopping - even from Simon Cowell - is going to clear it from the internet floor. It's called 'Don't Let Me Down' and it's a collaboration with Justin Timberlake's production crew The Y's ('Love Sex Magic', 'Dead And Gone'), with JT providing backing vocals on the chorus.

Is it any good? Well yes, but it's a grower not a shower. To be precise, it's a subtly synthy R&B ballad whose chorus melody doesn't reveal its true loveliness until you've heard the song three or four times. The lyrics are all about mutual support and dependency, always a good theme for a ballad, and we especially like the way Leona sings this couplet: "I got my ear to the ground / That's the sound of my train comin' 'round." Of course, it almost goes without saying that her vocals are gorgeous throughout. Oh, and that the leaked version clearly isn't finished.

We'll get our wrists slapped if we tell you where to find it, but let's just say it's available in all the you-sual places. (Ho ho ho.)

What do you think of 'Don't Let Me Down'? Are you excited about Leona's new album? Use the space below to have your say.