Security will be tight at the Aviva Stadium in Dublin tonight with 50,000 people set to attend a Robbie Williams gig.
People are being reminded that backpacks or large handbags will not be allowed into the venue.
There are also colour-coded routes to approach the stadium.
Event controller for the gig, Eamon Fox says it has been a long time in the planning.
"It's taken about 6 months to get to this stage in terms of management and planning, of security measurements in place, information to the public and to get the public here," he said.
"It's a good day out, it's a fun day out. Everybody will enjoy themselves. The weather is supposed to be great so we would suggest that you dress for the sun. It's supposed to be a hot day, which is unusual in Ireland, and a warm evening, so dress accordingly.
"Don't overdress because in the current climate we will not allow large bags or rucksacks into the venue."