The security operation at tonight's Eminem concert in Slane is one of the tightest ever seen at a music event in Ireland with 750 gardai on duty.
500 local stewards are also on hand to ensure everything runs smoothly.
Coast guard teams will also help patrol the River Boyne alongside the venue at Slane Castle
Event organisers MCD say that ticket holders will be subjected to at least three searches at various points as they enter the venue.
Gardaí will be searching for alcohol, drugs and potential weapons.
They have also warned that there will be a major clampdown this year on anyone caught drinking in public areas or near the Co Meath village.