Chris Brown -- What You Didn't See

2/9/2009 7:00 PM PST BY TMZ STAFF
Chris Brown was too busy turning himself in to the cops for allegedly assaulting Rihanna to perform at the Grammys last night -- but now we've got exclusive rehearsal video of what his routine would have looked like.

Chris Brown: Click to watch
This video was taken Friday during his Grammy rehearsal for "Forever," the song he was slated to perform.