Katy Perry and Bloc Party are the latest additions to this year's Oxegen bill.
The Irish festival will also see Dublin trio The Script perform.
It was previously announced Kings Of Leon would be headlining the event for the second consecutive year, while Snow Patrol and The Killers are set to play.
The festival takes place at Punchestown Racecourse, Naas from 10-12 July.
Tickets will be available to purchase from 6 March, though reservations can be made from 25 February.
The Irish festival will also see Dublin trio The Script perform.
It was previously announced Kings Of Leon would be headlining the event for the second consecutive year, while Snow Patrol and The Killers are set to play.
The festival takes place at Punchestown Racecourse, Naas from 10-12 July.
Tickets will be available to purchase from 6 March, though reservations can be made from 25 February.
