Dappy has been found guilty of affray in connection with a brawl at a petrol station.
The 25-year-old N-Dubz rapper was also convicted by a jury at Guildford Crown Court in Surrey of a charge of assault by beating which involved him spitting at a man.
The singer was cleared of two charges of common assault in which he was accused of spitting at but missing two 19-year-old women.
The week-long trial heard that Dappy, charged under his real name of Costadinos Contostavlos, had been out on February 27 last year celebrating the release of his single Rockstar featuring Queen guitarist Brian May.
After spending the night in the VIP area of the Casino nightclub in Guildford, the group were travelling back in three cars to the recording studios in Godalming where Dappy was recording his debut solo album when they stopped at a Shell garage.
Brian Stork, prosecuting, claimed that Dappy approached Grace Cochran and Serena Burton, both 19, who were sitting on the kerb outside the station shop and tried to persuade them to get into the car with him to continue the party at the studios.
The court was told that when they refused these advances and began to ridicule him, Dappy allegedly became angry and called them sluts. He was then accused of spitting at them but missing - the two counts of common assault faced by the singer.
Mr Stork said a man called David Jenkins who had been talking to the two women then stepped in to protect them but was spat at by Dappy. This spitting, which hit Mr Jenkins, makes up the charge of assault by beating. The court heard that Mr Jenkins put the rapper in a headlock, leading to several other people joining in the fight.
The jury also found Kieran Vassell, 25, guilty of affray and Kalonji Stewart, 32, not guilty of affray. A fourth man, Alfred Miller, 28, has pleaded guilty to affray and his case was adjourned for sentence at the end of the trial.
Judge Neil Stewart adjourned the case for pre-sentence reports to be prepared on Dappy and Vassell. Sentencing was set to be carried out on February 15 and the pair were released on unconditional bail until then.