Timberlake with the Man in Black?

In the October issue of Blender magazine, Evenescence's Amy Lee talks about being the new Johnny Cash video and say's that Justin Timberlake is in it too. Amy says,

"It was a shoot for the new Johnny Cash video. The concept is all these celebrities - Justin Timberlake, Tony Hawk, P.Diddy (or whatever his name is) - dressed in black like Johnny Cash. You know, expressing the pain of the world. They said I could do whatever I wanted, so I said, 'Why don't I go to a cemetary and lay some flowers on a grave.?'

So I wonder what Justin is doing for the video...and I'm not really getting why they chose any of these celebrities for a Johnny Cash video.