Former N-Dubz singer Dappy slapped a member of the public outside a nightclub in Chelmsford, Essex, a court has heard.
The 27-year-old, whose real name is Dino Costas Contostavlos, is accused of attacking George Chittock after a "meet and greet" at Chicago's in the early hours of February 2.
The pair were in a smoking area along with Contostavlos's minder and two of the club's own doorstaff at about 2am when he was seen to slap Mr Chittock, Prosecutor Jaqueline Carey told the court.
He denies assault by beating and is standing trial at Chelmsford Magistrates' Court.
More top news
Her ex-boyfriend Arthur Collins has been charged in connection with an acid attack at an east London nightclub.
The delay - which has seen the patient confined to a hospital bed for 1,338 days - has been described as "truly scandalous".
A toy dinosaur and a striped blanket the baby was wrapped in when it was born were among the items stolen.