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There is something about this that just doesn't add up, but here's what we know so far:

According to ET Online, Rihanna has cancelled her Grammy performance tonight after "sustaining a bruised face in what sources called a car accident." A Grammy rep told ET that Rihanna's face is "slightly bruised" and there's still no word on who will take her place.

This is where it gets REALLY interesting...Rihanna's boyfriend, Chris Brown is under investigation for attacking an unidentified woman in a car who sustained what police call "visible injuries." Police say Brown and the woman were in a car together, and the two got into an argument in the Hancock Park area of LA. The woman was allegedly injured during the incident, and she named Brown as her attacker, but when police arrived at the scene, Brown had taken off.

People also reports that LAPD are current looking for Brown, but they make no mention of Rihanna and her bruised face...

So, what's going on here?! Is Rihanna the unidentified woman? How else would she have gotten bruises on her face?

The video below is the last known footage of the two musicians together, shopping on Melrose and driving around Hollywood in Chris' silver Lamborghini on Friday afternoon...



Stay tuned, we'll bring you the latest details as soon as we get them!