Chris Brown has sparked outrage in the US after refusing to stand for the American national anthem on the 15-year anniversary of 9/11.
Police were also called to the event when the troubled pop star got into an argument with a spectator.
The 27-year-old stayed seated as R&B singer Tank performed the The Star-Spangled Banner at a charity basketball game in Los Angeles on Sunday.
The father-of-one is the latest celebrity to join San Francisco 49ers quarterback Colin Kaepernick's protest against racial injustice and police brutality.
Brown addressed the incident through his Instagram account.