Joe writes: I'm not sure what I think about the Jay Z album yet. I'm not even sure what I think about his contributions to this track. But Justin Timberlake's bits are sensational - some of the best melodies since Rihanna's part on Love The Way You Lie. I wonder who wrote the melodies? Whoever it is might have ended up with a small percentage of the song as there are nine songwriters listed including three members of Nirvana thanks to the Smells Like Teen Spirit steal. The most likely candidate apart from JT is Terius "The-Dream" Nash.