So, Coldplay’s Chris Martin wrote this song, so Cat Power’s Chan Marshall could sing it AND there’s a story behind this unlikely collaboration. According to NPR, Zach Braff hooked up Martin with an early version of the song and he wrote it inspired by it, however Chris Martin felt that a woman should sing it. They both sort of agreed that the most fitting voice would be Marshall’s. Braff also showed her the movie and she said yes. You can read it all here.