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.
This video was taken Friday during his Grammy rehearsal for "Forever," the song he was slated to perform.
Chris Brown -- What You Didn't See
2/9/2009 7:00 PM PST BY TMZ STAFF
Get TMZ Breaking News alerts to your inbox