This song was originally performed by a Swedish electronic duo called The Knife. Nicely, they were able to stay anonymous for many years. Until 2009, that is - when José González released an acoustic version of the song that reached #9 on the UK charts.
Here's the video for the song. It brings warmth and sadness to a song that was a purposefully and beautifully cold breakup song, and still the song works!!
Sony used this version of the song in a commercial - and that sparked interest in the original by The Knife - so they lost their anonymity and took to wearing Venetian bird masks. I include the bouncing ball video - the Sony Bravia commercial that caused all this trouble,