Up to old tricks? Chris Brown is accused of punching a woman

We all know Chris Brown's history with violence; breaking all of our hearts when he assaulted Rihanna in 2009, but we thought he changed since then.

Maybe he hasn't changed as much as we thought as police are investigating the claim that he punched a woman at a Las Vegas party.

According to TMZ, the woman snuck her phone into a party at Chris's suite at the Palms Hotel. When Chris saw the phone, the woman says he "went off," yelling and shouting at her and then punching her in the right eye.

We're hoping this isn't true and Chris didn't turn back to his old ways.