Guildford Crown Court heard that N-Dubz rapper Dappy sparked a "mob attack" when he spat at two girls who refused to get into a car with him and his friends.
Onlooker David Jenkins defended the girls after the rapper allegedly called them 'sluts' and 'ugly', and proceeded to put Dappy in a headlock, after the rapper swung a punch at him.
Dappy was joined by two other men and the incident at a petrol station in Guildford turned into a "mob-handed, utterly unlawful and aggressive attack" said Prosecutor Brian Stork.
A saliva stain on alleged victim David Jenkins' t-shirt has a "billion to one" DNA link to Dappy.
The rapper denies 2 counts of common assault on the two women, one of assault by beating, of Mr Jenkins, and one of affray.
The trial continues tomorrow.
More top news
New exhibit showcases how London could look very different in the future
Mayor Sadiq Khan is aiming to get 40 per cent of Tube stations to be step-free by 2022.
Mujahid Arshid, accused of murdering and raping Celine Dookhran, was "inspired" by acid bath killer John George Haigh, a court has heard.