Heard a song in river island december 2009 ghostly with little singing by woman- help what is it pls?

the song kept being played in end of november and definately in december 2009 in river island branches. theres not much singing. it sounds ghostly/eerie/ echoey. and i couldn't pick up what the women was saying when she sang. it was only this repeating a couple of times. Something like ' i want you this christmas ' i might be completely wrong about lyrics as i've tried googling it doesnt come up with song i heard. This is really bothering me. If its any help, the other song i heard part of collection was Wiley - Cash In My Pocket.