Chris appeared in a DC court. He and his bodyguard face a misdemeanor assault charge after an October altercation outside the W Hotel.
Speaking outside of court, Chris's lawyer, Danny Onorato, said they had decided not to accept the plea because "Chris Brown's not guilty".
His lawyers say they expect a trial date to be set at another hearing, scheduled for Feburary 20.
At the time he was charged, the Grammy winner was on probation in California for a 2009 attack on singer Rihanna, his then-girlfriend. As a result of the charge in Washington, a judge revoked Chris's probation in California.