of it is confirmed that chris brown assaulted rihanna. rihanna's injuries 'horrific'

TMZ has the story and many more events leading up to the Chris Brown-Rihanna saga. Law enforcement sources tell TMZ Rihanna's injuries were severe -- two "huge contusions" which swelled up on both sides of her forehead. We're told she also suffered "a bloody lip and nose."

Before the Arrest: Hours before he was arrested for making criminal threats, Chris Brown attended Clive Davis' pre-Grammy party with a smiling, unblemished Rihanna.

Chris Brown Pumped Up Before Arrest: While Rihanna waited in the car, Chris Brown pumped gas into his rented silver Lamborghini Friday night -- the same vehicle in which Brown allegedly went ballistic on a woman (identified by the L.A. Times as Rihanna) the following evening.

Brown's Rented Lamborghini Impounded: It appears this is the silver rental Lamborghini Chris Brown had driven the night of the alleged incident. We're told cops towed a vehicle from the scene at Hancock Park to a nearby police impound lot, where it still remains behind a chain-link fence. It was also mentioned that the Lambo costs $2000 for rental per day.

Chris Brown Could Do Nine Years in Prison: Law enforcement sources tell us they typically book a suspect for the most serious crime they can be charged with -- it's then up to the D.A. to file any additional charges. Given there were allegedly visible injuries, the crime of making criminal threats is punishable by up to nine years in prison. Domestic abuse is four years.

Prelude to Arrest: Link contains a photo of Chris Brown and Rihanna 30 minutes before he allegedly fought with her in this car.

Rihanna Alleged Victim -- Deadly Weapon Charge: TMZ has confirmed Rihanna is the named alleged victim in the Chris Brown case and the allegation is that she was assaulted with a deadly weapon. The crime report gives the victim's name as Robyn Fenty -- that's Rihanna's real name.

No Weapon: Law enforcement sources tell us even though the police report in the Chris Brown arrest refers to assault with a deadly weapon, there was no weapon involved in the alleged attack.

Young, Dumb, and Benched by Gum: Wrigley announced today they are suspending its ad campaign for Doublemint gum featuring Chris Brown.

Rihanna Bloody and Bruised: Law enforcement sources tell TMZ Rihanna's injuries were severe -- two "huge contusions" which swelled up on both sides of her forehead. We're told she also suffered "a bloody lip and nose."

What You Didn't See: 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.

Rihanna's Injuries -- "Horrific": Law enforcement sources have now gotten specific with us... police took pictures of Rihanna's injuries and they are "horrific." As we reported, the photos show major contusions on both sides of the singer's face -- there is serious swelling and bruising. Her lip is split and her nose bloody. We have now confirmed there are bite marks on one of her arms and on several fingers.