Tulisa Contostavlos had appealed against her conviction for assaulting a celebrity blogger at V Festival in Essex, but the singer has now been declared guilty.
The 26-year-old former 'X Factor' had been ordered to pay 3,020 pounds by Stratford Magistrates' Court last July for hitting Savvas Morgan at the event in August 2013, and the judge maintained the conviction, saying that she had experienced "a lack of self-control," the BBC reported.
However, her sentence was altered and she didn't have to pay 100 pound compensation to Mr Morgan. Her fine of 200 pounds was also changed to a conditional discharge, but she would have to pay an additional 1,500 pound in appeal costs.
At Snaresbrook Crown Court, Judge David Radford said Contostavlos accepted she became verbally aggressive, and has said that "we find that she did strike Mr Morgan, before very speedily the incident was brought to an end."
During the trial, Contostavlos had claimed that Mr Morgan had a "strange obsession" with her and conducted a "vendetta" against her after a confrontation in a nightclub.