On 13 December 2010,
Foo Fighters was announced as one of the headline acts of the 2011 festival, the first act to be announced. The band's album was scheduled to be released prior to the performance. It was scheduled to be their first performance at Oxegen since
2006. On 15 December,
Blink-182 was announced to play the festival for the first time. It had seldom performed in Ireland in the previous 15 years. On 16 December,
Paolo Nutini was announced, having performed at the festival in
2010. On 22 December,
The Black Eyed Peas was announced, having also performed at the festival in 2010. On 8 March 2011, the festival was officially launched, with
Coldplay announced as the bill-toppers in what would be their first appearance at Oxegen.
Dave Grohl hosted the presentation of the announcement on the festival's official website. Other artists to be added included
Bruno Mars,
All Time Low,
Brandon Flowers,
Beady Eye,
Swedish House Mafia,
My Chemical Romance,
Weezer,
Plan B,
Tinie Tempah,
Primal Scream,
Two Door Cinema Club,
Eels,
Calvin Harris,
Jimmy Eat World,
Hurts,
Ryan Sheridan, Bipolar Empire.
Bright Eyes,
The Bloody Beetroots,
Paolo Nutini,
The National,
Deadmau5,
Pendulum,
Leftfield,
Imelda May,
Eels,
The Vaccines,
Noah and the Whale,
Tiga,
Sven Väth,
Friendly Fires,
Crystal Castles,
Afrojack,
Chase & Status,
Ocean Colour Scene,
Fight Like Apes,
The Naked and Famous,
Mona,
Fun Lovin' Criminals,
Royseven,
Fenech-Soler, Madisun, Consumer Love Affair.
Slash,
OFWGKTA,
Metronomy,
Manic Street Preachers,
Glasvegas,
The Saturdays,
Peter Doherty,
The Pretty Reckless,
Professor Green,
Ke$ha,
Eliza Doolittle,
Example and Cherri Bomb were officially added to the line-up on 18 April. Blink-182, earlier announced as a headline act announced on 18 April that they were moving their European tour to 2012. So therefore have pulled out of this year's Oxegen festival.
Beyoncé was officially added to the line-up on 5 May. She, along with Coldplay, performed at the
2011 Glastonbury Festival ahead of Oxegen, leading to reports that tickets would start selling quickly again. On 31 May, the Red Bull Electric Ballroom was launched. On 27 June, the stage breakdown was announced. On 30 June, the stage times were announced.
Jessie J was forced to cancel her appearance at Oxegen 2011 due to a broken leg. ==Signing tent==