Do you know what song im looking for?

In december 2017 I visited London. I went to a candyshop and the radio was on. The song was performed by more than one woman, sort of a girlband, mayby like pussycat dolls. It was a christmassong, not by lyric as i remember it as more like a kind of a lovesong but with bells in it. I know they are singing "last night I" and thats all i remember. I shazamed it right away and was happy to find it, but now I cant find it on either Spotify or Shazam. Its the kind of christmassong as in "love actually" when they turn "love is allround" into a christmassong. But I really liked it, and I know it isnt much I am giving you, but maybe it was a huge hit this year in England and you all just know which song im thinking of... thank you for your time