Chris Brown's Birthday Party In Vegas Turns Violent After Altercation With Usher

A video shows Chris Brown arguing with Teyana Taylor and Usher at Brown's 34th birthday party.
Brown allegedly cursed at and disrespected Taylor while intoxicated, leading Usher to intervene.
The drama continued outside the venue, spilling onto Brown's bus and turning physical.
Usher emerged from the scuffle with a bloody nose while Brown continued yelling at partygoers.
The incident adds to Brown's history of violence and legal troubles, including physically assaulting Rihanna in 2009.