Jessie J has announced she will not play tonight at the gig in the Phoenix Park due to illness.
The Coronas instead will step in to take her place.
The band, who will be performing for President Michael D Higgins later this afternoon, will take to the stage for the second gig of the day as guests to Justin Timberlake.
X Factor winner James Arthur will take to the stage first at half six.
Speaking to Ray D'Arcy yesterday - Jessie was confident her voice would be fine;