Two concert-goers had to be arrested following a row at Croke Park during an Ed Sheeran gig, a court heard.
The pair were restrained by gardai following an altercation in a stand.
Raymond Byrne (24), of Constitution Hill, Dublin 7, pleaded guilty to causing a breach of the peace in the incident. Stephen Deane (30), of St Mary's Avenue, Dorset Street, denied the charge but failed to appear in court.
Judge Patrick Clyne convicted and fined Deane €250 in his absence.
He dismissed the case against Byrne after he apologised at Dublin District Court.
Gda Ciaran Kavanagh said he was on duty at the Hogan Stand at 10pm last July 24 and saw security restraining a man during a public order incident.
Gda Kavanagh arrested Byrne. Deane then became aggressive and had to be escorted outside.
Deane continued to be verbally abusive to the gardai and was also arrested.
There had been a previous altercation and Byrne "reacted quite badly" when gardai arrived, his solicitor said.
"He could have made things a lot easier for himself," he added.
The ticket had cost €65.
"Sheeran is on the wireless every day," the judge remarked. "He's even singing as Gaeilge now."